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Effect of pH on pitting corrosion of stainless steel welds in alkaline salt water
Highlights The pH play an important role in corrosion behavior of the weldment that consist of 304L stainless steel joint with 308L. As the pH increase, there is a gradual enrichment in corrosion resistance of the three zones (BM/HAZ/WM) of the weldment. WM showed a better corrosion resistance in the alkaline solution with 3.5% NaCl, followed by HAZ and BM. The passive film of the weldment in alkaline solution, presenting a bilayer structure, composed of an outer and inner layer.
Abstract Pitting corrosion was studied in the weldment of 304L austenitic stainless steels joint with 308L austenitic stainless steels. The corrosion behavior of three different weldment zones (weld metal (WM), base metal (BM) and heat affected zone (HAZ)) in alkaline solutions with NaCl was characterized by a series of electrochemical tests. The results indicated that pH values played an important role in the corrosion behavior of the weldment. With the pH increasing, the film resistance, polarization resistance and Ecorr increases, the charge carrier density N and the site of the pitting on the weldment decreases. In addition, WM showed a better corrosion resistance, followed by HAZ and BM. The pittings in BM were much bigger than that in WM and HAZ.
Effect of pH on pitting corrosion of stainless steel welds in alkaline salt water
Highlights The pH play an important role in corrosion behavior of the weldment that consist of 304L stainless steel joint with 308L. As the pH increase, there is a gradual enrichment in corrosion resistance of the three zones (BM/HAZ/WM) of the weldment. WM showed a better corrosion resistance in the alkaline solution with 3.5% NaCl, followed by HAZ and BM. The passive film of the weldment in alkaline solution, presenting a bilayer structure, composed of an outer and inner layer.
Abstract Pitting corrosion was studied in the weldment of 304L austenitic stainless steels joint with 308L austenitic stainless steels. The corrosion behavior of three different weldment zones (weld metal (WM), base metal (BM) and heat affected zone (HAZ)) in alkaline solutions with NaCl was characterized by a series of electrochemical tests. The results indicated that pH values played an important role in the corrosion behavior of the weldment. With the pH increasing, the film resistance, polarization resistance and Ecorr increases, the charge carrier density N and the site of the pitting on the weldment decreases. In addition, WM showed a better corrosion resistance, followed by HAZ and BM. The pittings in BM were much bigger than that in WM and HAZ.
Effect of pH on pitting corrosion of stainless steel welds in alkaline salt water
Li, L. (author) / Dong, C.F. (author) / Xiao, K. (author) / Yao, J.Z. (author) / Li, X.G. (author)
Construction and Building Materials ; 68 ; 709-715
2014-06-30
7 pages
Article (Journal)
Electronic Resource
English
Effect of pH on pitting corrosion of stainless steel welds in alkaline salt water
| Online Contents | 2014
Effect of pH on pitting corrosion of stainless steel welds in alkaline salt water
| British Library Online Contents | 2014
Effect of pH on pitting corrosion of stainless steel welds in alkaline salt water
| British Library Online Contents | 2014
| British Library Online Contents | 2010
| British Library Online Contents | 2007