Microsoft Word - European_Journal_of_Chemistry_8_2_2017_168_173_1558 ISSN 2 Applicat annealed Raphael Sh Doris Ezek Corrosion Protec * Corresponding Bauchi, Nigeria. Tel.: +234.903.39 ARTICLE INF DOI: 10.5155/eu Received: 23 Feb Received in revis Accepted: 05 Ap Published online Printed: 30 June KEYWORDS Adsorption Annealed carbon Biomass extract Elemental analy Corrosion inhibi Tapinanthus dod 1. Introducti The low attributed to surface whic Carbon steel material can s if corrosion c mented. The u in cases of c divisions such chemical op production u corrosion rat mental awar moved attent metal corrosi possess featu the basis that and more es based on the aqueous extra ted on the u 2153‐2249 (Prin tion of eth d carbon hadai Oguik kiel Amin Bo ction and Materials author at: Corrosio 970383. Fax: +234.9 FORMATION urjchem.8.2.168-1 bruary 2017 sed form: 01 April ril 2017 e: 30 June 2017 e 2017   n s sis ition doneifolius ion corrosion res its incapacity t ch controls the l which is the safely be opera control systems use of inhibitor corrosion preve h as acid pickli eration units, units are all inv tes in its proces eness, research tion to nontox ion inhibitors ures for next g t they are inexp specially, can p numerous mol act among othe use of biomass Eu t) / ISSN 2153‐2 ht Europ hanol extr corrosion e *, Abdullah oryo and Flo s Science Laborator on Protection and M 903.3970383. E‐ma 173.1558 2017 sistance of pu to build up pro e chemistry o e most cost ef ated in corrosiv s are properly d rs is widely acc ention. Moreov ing, descaling p steam genera volved with inh ss [1‐4]. Due to hes on corrosi xic inhibitors. B is beneficial in generation corr pensive, readily provide a broa lecular compos ers [5]. Several s extract to mi uropean Journal Europe 2257 (Online)  2 ttp://dx.doi.org/10 pean Jo Journal web racts of Ta n in 2 M H hi Mohamm orence Ikwo ry, Department of C Materials Science L ail address: oguike. ABSTRACT Protection effe corrosion of a investigated b elemental anal Microscope/ En The data obtai extract is temp corrosive envir with increase suppressed bo Calculated the spontaneous w phenomenon temperature. T FE164531 surf while SEM show Cite this: Eur. J ure carbon ste otective layer o f the environm ffective engine ve service condi designed and im epted as param ver, some indu processes, pipe ators, oil and hibitors due to increasing env ion protection Biomass extrac n many respect rosion inhibitor y available, nont ad spectrum a sition present i authors have re itigate corrosio of Chemistry 8 ( ean Journal of Ch 2017 Atlanta Pub 0.5155/eurjchem ournal bpage: www. apinanthu HCl and 3. mad Shibdaw Omizegba Chemistry, Abubaka Laboratory, Depart .raphael@yahoo.co ect of ethanol nnealed carbon by weight loss lysis was carrie nergy Dispersive ned from weigh perature‐concen ronment increas d temperature oth the cathod rmodynamic pa with likely elect consistent wit The elemental a face supporting wed lesser corro J. Chem. 2017, 8( eel is n the ment. ering itions mple‐ mount strial lines, d gas high viron‐ have cts as t and rs on toxic, action n the epor‐ on of carb and solu extra rene simi rable S basi pres com that T of th extra carb expe isoth para men corr surfa (2) (2017) 168‐1 hemistry lishing House LLC m.8.2.168-173.15 of Che eurjchem.com us dodone 5% NaCl wa, Usman Ib ar Tafawa Balewa tment of Chemistry, om (R.S. Oguike). extracts of Tap n (FE164531) in and electroche ed out on the c e X‐ray Spectros ht loss revealed tration depende sed with increas e. Electrochemi ic and anodic arameters show trostatic interac th unfavorable analysis data s strong adsorptio oded surface in t (2), 168‐173 bon steel, mild s many other tions [6‐11]. acts among ot ewable and con ilar electronic e to convention Some authors cally point to t sence of unique mpounds has be enhances prote The current stu he adsorption a acts of Tapina bon in 2 M HC erimental data herm while the ameters such as ntal assessmen roded surface to ace. 173 C ‐ All rights rese 558 emistry m eifolius to solutions brahim Tafid University, PMB 02 , Abubakar Tafawa pinanthus dodon n 2 M HCl and emical techniqu corroded specim scopy (SEM/EDS that the corrosi ent. The effective sing TD extract c cal polarizatio processes on wed that TD ex ctions which pr adsorption w how the presen on of extract con the presence of T steel, stainless metal/alloys Numerous adv thers include t ntain a number structures and nal organic corr believe that c their molecular e atoms such a en widely repo ection efficienc udy presents t and corrosion i anthus dodone Cl and 3.5% N a were fitted e effect of tempe s ∆Hads and ∆Sa nt, elemental a o ascertain the p rved ‐ Printed in y inhibit s da, 248 Bauchi, Nigeria a Balewa University neifolius leaf (T 3.5% NaCl solu ues. Surface mo mens using Sca S) to augment re ion protection p eness of protect concentration w n data showe FE164531 spe xtract adsorptio ropose physical with increasing nce of TD extr nstituents on th TD extract. steel, aluminum in both acid vantageous us that they are b r of organic com d functions tha rosion inhibitor orrosion inhib r structure [12‐ as N, O and S i orted to be an e y of inhibitors the experiment inhibiting effica eifolius leaves NaCl solution c into Langmu erature gave th ads. In addition analysis was presence of TD the USA a y, PMB 0248 TD extract) on ution has been orphology and nning Electron esults obtained. potentials of TD tion against the which decreased ed TD extract cimen surface. n process was l adsorption, a experimental ract species on e metal surface m, magnesium and alkaline e of biomass biodegradable, mpounds with at are compa‐ rs. itor efficiency ‐16] while the n heterocyclic effective factor [17‐20]. tal assessment acy of ethanol on annealed corrosion. The ir adsorption hermodynamic to the experi‐ done on the extract on the 2. Experimen 2.1. Material Experime sheets of 99 Materials (Ey sition (ppm) annealed car dimensions a middle upper metallograph specimens w [21] howeve evaporator. I concentrate a concentration analytical gra data analyses station and gr 2.2. Weight lo Previousl determine th immersion co and unstirred rods. To dete a freely aera Oguike et al., reproducibilit reported. The BRAN digital 2.3. Electroch The FE1 mechanically chemical exp sealed with t squared tota cautiously de weight loss ex a three‐electr Graphite rod as counter FE16451 wa performed in immersion a Potentiodyna potential ran rate of 0.33 verify the rep 2.4. Surface c The mor after 45 h o scanning ele magnification FE164531 sp stopper by m (SPI). The FE coating of g Q150RS (Zeis was done a Dispersive X‐ in a VG TC IN source (148 (accelerating pressure in t ntal l preparation ents were con 9.5% purity o ynsham, Oxford similar to the o rbon sheet wa as specimen w r edge of specim hic emery pa ere prepared a r, the extract Inhibitor test s as described by ns. All test solu ade chemical re s were carried o raphing worksp oss ly cleaned FE16 e initial weight onditions in 25 d 200 mL test rmine the weig ated thermosta [21]. All tests w ty of the resu e weight loss e weighing balan hemical techni 164531 speci into dimensio periments. Ea thermosetting r al surface are egreased using xperiment. Elec rode corrosion and saturated and reference as the working n aerated and un at open circu amic polarizati ge of ‐0.25 mV mV/s. Each ex producibility of characterizatio rphologies of t of immersion ectron microsc n range: 10× ‐ 1 pecimens were means of 3.0 M 164531 specim gold deposited ss Systems, Ger after the EDS ‐Ray Emission S NCA PentaFET 6.7 eV photon voltage 12.5 k he analysis cha Oguike et al. nducted using obtained from d, England) with one presented e as press‐cut in ith a hole of 1 men and were fu aper of finen as described in was concentra solutions were y Njoku et al., [5 utions were fre agent using bid out using Origin pace. 64531 specime t thereafter, sus 50 mL beakers t solutions, usin ght loss, the bea ated water ba were run in tri ults and the a experiment was nce of the range ique imens were ons of 1.5×1.5 c ch specimen resin leaving ex ea. The bare g the procedure ctrochemical te cell as reporte calomel electro e electrodes g electrode. M nstirred solutio uit potential ( ion scans wer V to +1.6 mV vs xperiment was the systems. on the corroded were inspecte cope, resolutio 180000×, SE de attached on t carbon condu mens were coate on the surfa rmany) gold pl S spectra ana Spectroscopy (E x3 spectromet ns energy) op kV, emission cu amber did not / European Jour g annealed ca m Advent Rese h elemental co elsewhere [21] nto 4.0×4.0×0.1 1 mm drilled a urther abraded ness pp1000. our previous w ated using rota prepared from 5] to get the de eshly prepared distilled water w n Pro8 Data ana ens were weigh spended under containing aer ng glass hooks akers were plac ath as reporte iplicate to verif average data s realized using e 0.0001 to 160 further mach cm2 for the ele was appropri xposed only 1. surface area e described fo est was conduct ed by reference ode (SCE) were respectively w Measurements ons at the end o (OCP) versus re obtained w s. SCE and at a run in triplica FE164531 sur ed on Vega Te on 80 Angstr etector, HV 20. op of an alum uctive adhesive ed with an ultra ace using Quo lating machine. alysis. The En EDS) were reco er with Mg K‐X perated at 30 urrent 24 mA) exceed the val rnal of Chemistry arbon earch mpo‐ . The 1 cm at the d with The work atory m the esired from while alysis ed to total rated s and ced in d by fy the were g a B. g. hined ectro‐ iately 0 cm was r the ted in e [5]. used while were of 1 h SCE. within scan ate to rfaces escan roms, 0 kV. inum tape a‐thin oirum This nergy orded X‐ray 00 W . The ue of 2.66 acqu softw 3. Re 3.1. T imm and pres conc show ciab both the extra corr abse P% T effic decr effic NaC temp of t optim Figur leaf e (a) 2 y 8 (2) (2017) 16 6×10–6 ‐ 4.0×10 uisition. All sp ware. esults and disc Gravimetric re The corrosion mersed in 2.0 M presence of sented in Figure centrations of T wn in Figure 2. ly retards the h 2.0 M HCl and corrosion proc act was quantit rosion rates in t ence of the inhib 1 The results pr ciency increase reased with ciencies observ l solutions ha perature 303 K the substrate b mum level with re 1. Corrosion rat extract concentrat M HCl solution (b) 8‐173 0–6 Pa during t pectra were de cussions esults rate (mm.y‐1) HCl and 3.5% N TD extract at e 1 while the pr TD extract as a . The result sho corrosion rate 3.5% NaCl solu cess. The prote tatively evaluat the presence o bitor (CR1) as fo 100 resented in Fig ed with TD increased tem ved for TD extr ad their optim K which indicat by the TD ex hin low tempera te (mm.y‐1) of FE16 tion and temperatu ) 3.5 % NaCl soluti the entire peri econvoluted wi ) for FE16453 NaCl solutions t varying temp rotection exerte function of tem owed that TD e e of FE164531 utions indicatin ection efficiency ted by computi f inhibitor (CR2 ollows; gure 2 show th extract conce mperature. Th ract in 2.0 M H mum at 1000 tes that the sur tract inhibitor ature. 64531 specimen as ure determined by on. 169 iod of spectra ith EDS INCA 31 specimens in the absence peratures are ed by different mperature are extract appre‐ 1 specimen in ng inhibition of y (P%) of the ng the ratio of 2) with that in (1) hat protection entration but he protection HCl and 3.5% 0 mg/L with rface coverage r attended an (a) (b) s a function of TD y the weight loss 170 Table 1. Corros extract. Solution Blank 10 mg/L 100 mg/L 1000 mg/L Table 2. Corros extract. Solution Blank 100 mg/L 1000 mg/L Figure 2. Protec men as a funct solution 3.2. Potentio The pote distinct effec dissolution h Representativ and 3.5% N different conc 3 and 4. The extrapolation in 2.0 M HCl FE164531 in extrapolating cathodic curv is clear from sion parameters ob ion parameters ob ction efficiency (P tion of temperatur dynamic polar entiodynamic p cts of any inhib half reactions ve polarization aCl solutions centrations of T e extracted pol n of Tafel slope l solution whil n 3.5% NaCl s g the sequent ves to the poten Figure 3, that Og btained from pote Parameters icorr (μA/cm 5006.1 2409.18 722.66 326.45 btained from poten Parameters icorr (μA/cm 27.53 17.50 18.41 %) of TD leaf extr re (a) 2 M HCl s rization results polarization pl bitor on the a of various c n plots for the in the absenc TD extract are larization param are listed in Ta le Table 2 reco olution, which tial division o ntial x‐axis (Taf TD extract de uike et al. / Euro entiodynamic pola s m2) ntiodynamic polar s m2) ract on FE164531 olution (b) 3.5 % s ots help show anodic and cath orrosion react metal in 2.0 M ce and presenc presented in F meters obtaine able 1 for FE16 ords the value were obtaine of the anodic fel extrapolatio creased the cu opean Journal of rization scan for F Ecorr (mV(SCE)) ‐357.28 ‐452.1 ‐453.9 ‐467.8 ization scan for FE Ecorr (mV(SCE)) ‐695.72 ‐710.35 ‐680.68 (a) (b) speci‐ % NaCl w the hodic tions. M HCl ce of igure ed by 4531 es for ed by and on). It rrent dens H2(g) disso proc exte inhib the p did a in c inhib FE16 NaC extra curr conc (Tab NaC we d extra actio adso it is mag shift corr (jcorr quan usin P % T conc Figur aerat extra f Chemistry 8 (2) FE164531 in 2 M ) E164531 in 3.5 % ) sities of both hy )) that is, cat olution reaction cess. This obse nt implies tha bitor. However polarization plo alter the corros corrosion curr bitor reduced 64531 surface. l solution as s act did not shif rent was notice centration up t ble 2), TD extra l solution as re decided to rep act. This poor on free Cl– ion orbed TD extrac s also clear th gnitude of the co ted Ecorr towa rosion current r‐inb) of differen ntify the magn ng the Equation % 1 The results sho centration, in ag re 3. Potentiodyna ted solution of 2 act. (2017) 168‐173 HCl solution in th θ ‐ 0.5188 0.8556 0.9348 NaCl solution in th θ ‐ 0.3643 0.3312 ydrogen gas evo thodic corrosio n (Fe → Fe2+ + rved mitigation at TD extract r, except for the ots for all syste sion mechanism ent density p material diss A different sce seen in Figure ft the rest poten ed which furthe o the optimum act had poor p ecorded in the port results for protection eff s migrating th ct layer on the hat addition of orrosion curren rds more neg density in abs nt concentration nitude of the (2); 100 ow higher PE% greement with amic polarization M HCl solution in he absence and pre PE % ‐ 51.88 85.56 93.48 he absence and pr PE % ‐ 36.43 33.12 olution reaction on process an 2e) that is ano n of both proce functioned as e shift in the ne ems revealed th m of the metal. points to the solution via a enario was obs e 4. The introd ntial but a decr er decreased w m at 1000 mg/L protection effic weight loss ex 100 and 1000 ficiency is attr hrough and und metal surface. f TD extract d nt density and a gative values. sence (jcorr‐free) n of TD extract protection eff % value at high the gravimetric curves for FE164 n the absence and esence of TD leaf resence of TD leaf ns (2H+ + 2e → nd the metal odic corrosion esses to some a mixed‐type egative of Ecorr, hat TD extract . The decrease fact that the adsorption on erved in 3.5% duction of TD ease in anodic with increasing L. As observed ciency in 3.5% xperiment and 0 mg/L of the ributed to the dermining the From Table 1, decreased the as well slightly The value of and presence t were used to ficiency (PE%) (2) her TD extract c data. 4531 specimen in d presence of TD Table 3. Thermo Sample Blank 10 mg/L 100 mg/L 1000 mg/L Figure 4. Poten aerated solution extract. 3.3. Thermod Thermod 2 M HCl and 3 TD extract w equation belo . . ex where, CR is plank’s const gas constant. Transition Figure 5 has [Log(R/N.h) + ΔS* were eva had high act entropy valu produced mo Table 3 show plot for entha dissolution an positive sign process sugge tion and re activation (ΔS process of dis an orderly f negatively via 3.4. SEM/EDS The obta corroded FE1 M HCl and 3. extract are sh revealed that in 2 M HCl so shallow pits solution, the pits all over. odynamic activatio 2 M HCl ∆S*ads (×1018) J ‐3.41 ‐3.05 ‐2.54 ‐0.44 ntiodynamic polari n of 3.5% NaCl sol dynamic consid ynamic functio 3.5% NaCl solut were obtained ow; xp ∆ ∗ exp the corrosion r tant, T is absolu n state linear p s a slope of + (ΔS/2.303.R)] aluated. Obtain tivation enthal ues being high ore disorderline ws the values a alpy of activatio nd inhibition o of ΔH* show esting increase etards protect S*) values were ssolution and t fashion as the a adsorption oc S analysis resu ained microgra 145631 surface 5% NaCl soluti hown in Figure t the FE145631 olution revealin distributed ove surface was co The observed Oguike et al. on parameters of T J/mol.K ∆H*ad 2.85 2.97 3.15 3.85 ization curves for lution in the abse deration ons for dissolut tion in the abse by applying t ∆ ∗ . rate, N is Avog ute temperatur plots of TD extr (‐ΔH*/2.303⋅R ] from which th ned data indica lpy and entrop her in 3.5% N ess and lower p acquired from on and entropy f FE164531 in ws the endothe e in temperatur tion efficiency e negative indic the presence of e values were ccurring at the m ults aphs of repre e after 45 hour ion in absence e 6 and 7. The s 1 specimen was ng rough and n er the surface rroded with hig precipitates on / European Jour TD leaf extract adso ds (×1021) J/mol FE164531 specim nce and presence tion of FE1645 ence and presen the transition gadro’s number e and R is univ ract action show ) and intercep he values of ΔH* ates that TD ex py values with aCl solution w protection effici the transition of activation fo both solutions rmic nature o re increases dis y. The entrop ating a spontan f TD extract ind e seen to decr metal surface. esentative area s of immersion and presence o surface examin s severely corr nodular surface while in 3.5% gh density sphe n the metal su rnal of Chemistry orption on FE1645 3 r2 ∆ 0.8399 ‐ 0.8382 ‐ 0.8242 ‐ 0.9277 ‐ men in of TD 31 in nce of state (3) r, h is versal wn in pt of * and xtract h the which ency. state or the s. The f the ssolu‐ py of neous duced rease as of n in 2 of TD ation roded with NaCl erical urface (Figu duri FE14 actu belo 3FeO 2Fe Figur in (a) F not leaf the p ted ligan affin extra mole N ch This y 8 (2) (2017) 16 531 specimens. 3.5 % NaCl ∆S*ads (×1019) J/m ‐1.11 ‐1.09 ‐1.05 ‐0.97 ure 6b) might ng rinsing afte 45631 surface ually oxidizes to ow: O O → Fe O O → 3 re 5. Transition sta ) 2 M HCl, (b) 3.5% Fe3O4 is known compact and q Fe surface into protective film the surface to nds formed wit nity Fe atoms act molecular ecular plane pa helate ligands s is in concessio 8‐173 mol.K ∆H*a 5.87 6.72 8.03 10.4 be NaCl crysta er the immersio confirms the u o soluble Fe2O3 O 2e Fe O 2e ate theory plot of T % NaCl solution. n to form protec quickly oxidize o the bulk solut (if any). TD ex a good degre h Fe atoms. As has for nitrog composition m arallel to FE145 as confirmed b on with the find ads (×1020) J/mol 9 als that were no on test. The co unstable state 3 and Fe3O4 via TD extracts on FE1 ctive film on Fe to Fe2O3 that tion enhancing tract is seen to ee due to comp expected, due t gen and sulph might directly 5631 surface to by the EDS ana ings of Kosari e 171 r2 0.9639 0.9603 0.9788 0.9902 ot washed out rrosion prone of FeO which a the equation (4) (5) (a) (b) 164531 specimen surface that is is porous and dissolution of o have protect‐ plex chelating to the electron ur atoms, TD adsorb on a form S‐Metal‐ alysis spectra. et al. [22]. 172 Fi Figure The corro straight grov mechanical fa metal surfac mechanical fa indication tha in various me 3.5. Elementa Energy di tion about th tuents. It is corrosion is a stable film o lexation of th corroded sp performed to deposits form 8‐11. The re extract prese suggesting th HCl is a non‐ ting of a mixt main phase a carbon atoms interaction of electrostatic could be from stub. The pr sulphur, nitr igure 6. SEM micr e 7. SEM micrograp oded FE14563 ves on the surfa aults caused d ce. TD extract aults as they w at TD extract co edia effectively. al analysis ispersive X‐ray he protection widely accept associated with on metal surfac he inhibitor mo pecimen surfa o characterize med. The result esults for 2 M ented in Figure hat the main co ‐stoichiometric ture of FeO(OH s reported by S s appeared in t f carbon molecu interaction, mo m the carbon resence of oxyg rogen and chlo Og (a) ographs of FE1456 (a) phs of FE145631 su 31 in 3.5% Na face as a result uring mechani is seen to a were barely vis ould sufficiently y analysis gave mechanism of ed that the pr formation and ce through the olecules [22]. E ces after imm any surface ts obtained are M HCl solution 9 reveals high orrosion produc c Fe3+ oxide/ox ) and Fe2O3, wh Samide et al. [23 the inhibited sp ules with the sp oreover, the hig tape (SPI) use gen as well as orine disclosed uike et al. / Euro 631 surface after im urface after immer Cl solution sho t of corrosion a cal polishing o adsorb along t sible (Figure 6 y protect Fe su additional info the extract co rocess of inhib growth of inso e process of c EDS analysis o mersion test film and corro as shown in F with the inhi oxygen peak s ct of carbon ste xyhydroxide, co here FeO(OH) i 3]. The high pea pecimen sugge pecimen surfac gh strength of d for the spec s minor amou d by EDS ana opean Journal of mmersion for 45 h rsion for 45 h in (a owed along of the these 6), an urface orma‐ onsti‐ biting oluble omp‐ of the was osion igure ibitor signal eel in onsis‐ is the ak for est an ce via peak cimen nt of alysis indic S an that FeO, This proc via e The phos adso sodi the N Figur M HC f Chemistry 8 (2) h in (a) 2 M HCl (b) a) 2 M HCl (b) 3.5% cates the prese nd N on the spe the corrosion , possibly with s agrees with cess involves th electron exchan EDS spectra sphorrous an orption sites on um atoms is su NaCl solution. Element C Cl Fe Totals re 8. EDS analysis Cl solution without (2017) 168‐173 (b) 3.5% NaCl solutio (b) % NaCl solutions wi ence of iron oxid ecimen surface n products that h traces of (N‐ the view of E he formation of nge that leads t for Fe in 3.5 nd potassium n FE surface. T uspected to be We 3 6 1 of the corrosion p t inhibitor. ons without inhibit ith TD extract as in de and complex . The EDS spec t formed on F Fe‐S)ads and ( l‐Sayed [24] t f chelate on the to coordinate c 5% NaCl solu atoms indi The presence due to the pre eight % 32.79 0.63 66.58 100.00 products on FE145 tor. nhibitor. xing ligands of ctra confirmed FE145631 was (Fe‐Cl‐TD)ads. that inhibition metal surface covalent bond. ution included icating more of silicon and ecipitates from Atomic % 69.29 0.45 30.26 100.00 5631 surface in 2 El T Figure 9. EDS a M HCl solution in Ele T Figure 10. EDS 3.5% NaCl soluti Elem C N O Na Si P S C K Fe Tot Figure 11. EDS 3.5% NaCl soluti 4. Conclusion The objec corrosion pro M HCl and 3. protection p lement C N O S Cl Fe Totals analysis of the corr n the presence of T ement C O Cl Fe Totals analysis of the co ion without inhibit ment C N O a i P S l K e als analysis of the co ion in the presence ns ctive of this stud otection ability .5% NaCl solut process. Our r Oguike et al. Weight % 9.45 0.68 23.10 0.10 1.06 65.61 100.00 rosion products on TD extract. Weight % 3.35 29.94 0.53 66.19 100.00 orrosion products tor. Weight % 49.30 10.77 13.65 1.22 0.10 0.10 0.39 2.05 0.78 21.63 100.00 orrosion products e of TD extract. dy was to asses on annealed ir tion and to atte results did sh / European Jour Atomic % 22.57 1.39 41.40 0.09 0.86 33.69 100.00 n FE145631 surfac Atomic % 8.32 55.86 0.45 35.37 100.00 on FE145631 surf Atomic % 65.52 12.28 13.62 0.85 0.06 0.05 0.20 0.92 0.32 6.18 100.00 on FE145631 surf ss TD leaf extra ron (FE145631) empt explainin ow that corro rnal of Chemistry % ce in 2 % face in face in ct for ) in 2 g the osion prot extra of t adso pass rem enth exte surfa attri on th corr Ackn T for s Educ spon Hod Univ Oguz Deve Nige equi anal Refe [1]. [2]. [3]. [4]. [5]. [6]. [7]. [8]. [9]. [10]. [11]. [12]. [13]. [14]. [15]. [16]. [17]. [18]. [19]. [20]. [21]. [22]. [23]. [24]. y 8 (2) (2017) 16 tection was ach act found on th he interesting orbed organic sivation potenti arkably impro halpy. We have nt of protectio ace. The result ibuted to spont he Fe surface, h rosion inhibiting nowledgemen The authors ar sponsoring the cation Trust F nsoring part o gson, Director versity, Graham zie, Director elopment, Fed eria are also ipment for su lysis, respective erences Ozcan, M.; Karad 1392. El‐Etre, A. Y.; A 385‐395. Oguike, R. S. Adv Arukalam, I. O.; Sci. Tech. 2014, Njoku, D. I.; Uka J. Mol. Liq. 2016 Zhang, Y. N.; Zi, J 240‐243. Deyab, M. A.; Ed Mele, G. Desalina Ekpe, U. J.; Oka Electrochem. 20 Khaled, K. F. Cor El‐Etre, A. Y.; A 385‐395. Lopez, D. A.; Sim 845‐854. Rodriguez‐Valde Ju, H.; Zhao, P.; L Lesar, A.; Milose Bentiss, F.; Mer Sci. 2010, 53, 48 Kai, Z. P.; Li, Y. C Oguzie, E. E.; Wa 8420‐8429. John, S.; Joseph, A. Mater. Chem. P Oguike, R. S.; Ko Chem. 2013, 175 Raja, P. B.; Sethu Lebrini, M.; Trai Sci. 2008, 50, 47 Oguike, R. S.; Ko Sci. J. 2015, 8, 1‐ Kosari, A.; Moay H.; Moradi, H. Co Samide, A.; Tutu 299‐308. El‐Sayed, N. H. E 8‐173 hieved via the o he Fe surface a conclusions f species mo ial the metal ex oved positively e also used SE on and possibl ts showed reas taneous adsorp hence credited g efficacy of TD nts re grateful to G publication of Fund Nigeria 2 of the laborat r of Electron mstown, South of Centre for deral Universi appreciated urface morph ely. dag, F.; Dehri, I. Ac Abdallah, M.; El‐Ta v. Mater. Phys. Chem Madufor, I. C.; Og 4, 1445‐1460. ga, I.; Ikenna, O. B. , 219, 417‐424. J. L.; Zheng, M. S.; Z ddahaoui, K.; Esse ation 2016, 383, 38 afor, P. C.; Ebenso, 01, 17, 131‐135. rros. Sci. 2010, 52, Abdallah, M.; El‐Ta mison, S. N.; Sanche ez, L. M.; Martinez Liang, Q.; Li, Y. App ev, I. Chem. Phys. Le nari, B.; Traisnel, 87‐495. Corros. Sci. 2008, 50 ang, S. G.; Li, Y.; Wa B.; Balakrishnan, Phys. 2010, 123, 2 olo, A. M.; Shibdaw 5910, 1‐9. uraman, M. G. Mate isnel, M.; Lagrenee 73‐479. olo, A. M.; Ayuk, A. A ‐12. yed, M. H.; Davoodi orros. Sci. 2014, 78 unaru, B.; Negrila, Eur. J. 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