Control the corrosion of mild steel using synthesized polymers based on polyacrylamide
In this work polyacrylamide (PACM) was prepared by radical polymerization technique using ammonium persulfate (APS) as initiator under nitrogen atmosphere. The viscosity average molecular weight of the prepared PACM was found to be 177858. The free amino groups of PACM, poly(2-methoxyaniline) was gr...
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Egyptian Petroleum Research Institute
2018-12-01
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| Series: | Egyptian Journal of Petroleum |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110062117303306 |
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| author | Eid M.S. Azzam Hanafy M. Abd El-Salam Reham A. Mohamed Samy M. Shaban Asmaa Shokry |
| author_facet | Eid M.S. Azzam Hanafy M. Abd El-Salam Reham A. Mohamed Samy M. Shaban Asmaa Shokry |
| author_sort | Eid M.S. Azzam |
| collection | DOAJ |
| description | In this work polyacrylamide (PACM) was prepared by radical polymerization technique using ammonium persulfate (APS) as initiator under nitrogen atmosphere. The viscosity average molecular weight of the prepared PACM was found to be 177858. The free amino groups of PACM, poly(2-methoxyaniline) was grafted by the oxidation of 2-methoxyaniline using APS in acidic medium under nitrogen atmosphere. The grafting percent is found to be 96%. The morphology of the obtained PACM and PACM-g-P2-MeOANI was studied by X-ray diffraction and scanning electron microscope. The grafting process enhances the morphology of both PACM and poly(2-methoxyaniline). The inhibiting effect of the three polymers on the mild steel corrosion in the 1.0 M HCl as aggressive environments have been measured gravimetrically at three different temperatures 25, 40 and 55 °C and electrically at 25 °C. The inhibition efficiencies of the three tested polymers were found to increase with temperature. The poly(2-methoxyaniline) is the most effective one as a corrosion inhibitor at all tested temperatures. The adsorption behavior of the polymers was found to follow Villamil isotherm and the values of the change in free energy refer to a mixed chemical and physical adsorption on the steel surface. Tafel curves indicate that the tested polymers act as mixed anodic and cathodic inhibitor. The double layer capacitance was found to decrease with increasing the inhibitor concentration. Keywords: Polyacrylamide-graft-poly (2-methoxyaniline), Carbon steel, Corrosion inhibition |
| format | Article |
| id | doaj-art-a844f68b728b4844a7dcb161f14ceaf3 |
| institution | DOAJ |
| issn | 1110-0621 |
| language | English |
| publishDate | 2018-12-01 |
| publisher | Egyptian Petroleum Research Institute |
| record_format | Article |
| series | Egyptian Journal of Petroleum |
| spelling | doaj-art-a844f68b728b4844a7dcb161f14ceaf32025-08-20T03:04:43ZengEgyptian Petroleum Research InstituteEgyptian Journal of Petroleum1110-06212018-12-0127489791010.1016/j.ejpe.2018.01.006Control the corrosion of mild steel using synthesized polymers based on polyacrylamideEid M.S. Azzam0Hanafy M. Abd El-Salam1Reham A. Mohamed2Samy M. Shaban3Asmaa Shokry4Applied Surfactants Laboratory, Petrochemicals Department, Egyptian Petroleum Research Institute, 11727 Nasr City, Cairo, Egypt; Corresponding author.Department of Chemistry, Faculty of Science, Polymer Research Laboratory, Beni-Suef University, 62514 Beni-Suef City, EgyptDepartment of Chemistry, Faculty of Science, Polymer Research Laboratory, Beni-Suef University, 62514 Beni-Suef City, EgyptApplied Surfactants Laboratory, Petrochemicals Department, Egyptian Petroleum Research Institute, 11727 Nasr City, Cairo, EgyptDepartment of Chemistry, Faculty of Science, Polymer Research Laboratory, Beni-Suef University, 62514 Beni-Suef City, EgyptIn this work polyacrylamide (PACM) was prepared by radical polymerization technique using ammonium persulfate (APS) as initiator under nitrogen atmosphere. The viscosity average molecular weight of the prepared PACM was found to be 177858. The free amino groups of PACM, poly(2-methoxyaniline) was grafted by the oxidation of 2-methoxyaniline using APS in acidic medium under nitrogen atmosphere. The grafting percent is found to be 96%. The morphology of the obtained PACM and PACM-g-P2-MeOANI was studied by X-ray diffraction and scanning electron microscope. The grafting process enhances the morphology of both PACM and poly(2-methoxyaniline). The inhibiting effect of the three polymers on the mild steel corrosion in the 1.0 M HCl as aggressive environments have been measured gravimetrically at three different temperatures 25, 40 and 55 °C and electrically at 25 °C. The inhibition efficiencies of the three tested polymers were found to increase with temperature. The poly(2-methoxyaniline) is the most effective one as a corrosion inhibitor at all tested temperatures. The adsorption behavior of the polymers was found to follow Villamil isotherm and the values of the change in free energy refer to a mixed chemical and physical adsorption on the steel surface. Tafel curves indicate that the tested polymers act as mixed anodic and cathodic inhibitor. The double layer capacitance was found to decrease with increasing the inhibitor concentration. Keywords: Polyacrylamide-graft-poly (2-methoxyaniline), Carbon steel, Corrosion inhibitionhttp://www.sciencedirect.com/science/article/pii/S1110062117303306 |
| spellingShingle | Eid M.S. Azzam Hanafy M. Abd El-Salam Reham A. Mohamed Samy M. Shaban Asmaa Shokry Control the corrosion of mild steel using synthesized polymers based on polyacrylamide Egyptian Journal of Petroleum |
| title | Control the corrosion of mild steel using synthesized polymers based on polyacrylamide |
| title_full | Control the corrosion of mild steel using synthesized polymers based on polyacrylamide |
| title_fullStr | Control the corrosion of mild steel using synthesized polymers based on polyacrylamide |
| title_full_unstemmed | Control the corrosion of mild steel using synthesized polymers based on polyacrylamide |
| title_short | Control the corrosion of mild steel using synthesized polymers based on polyacrylamide |
| title_sort | control the corrosion of mild steel using synthesized polymers based on polyacrylamide |
| url | http://www.sciencedirect.com/science/article/pii/S1110062117303306 |
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