Influence of iron microstructure on the performance of polyacrylic acid as corrosion inhibitor in sulfuric acid solution |
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| Authors: | SA Umoren Y Li FH Wang |
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| Affiliation: | aState Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, 62 Wencui Road, Shenyang 110016, PR China;bDepartment of Chemistry, Faculty of Science, University of Uyo, P.M.B 1017, Uyo, Nigeria |
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| Abstract: | The corrosion inhibition behavior of bulk nanocrystalline ingot iron (BNII) fabricated from coarse polycrystalline ingot iron (CPII) by severe rolling technique by polyacrylic acid (PAA) was studied in 0.1 M H2SO4 using electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The results indicated that PAA inhibited the acid induced corrosion of both iron specimens, with greater effect noted for BNII. The corrosion inhibiting effect was influenced by the microstructure of the iron samples. Synergistic inhibition effect was observed on addition of iodide ions to PAA in case of CPII while for BNII inhibition efficiency marginally increased. |
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| Keywords: | A Iron C Corrosion inhibition A Polyacrylic acid C Nanocrystallization C Microstructures |
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