Synergy of Cu and Sb to enhance the resistance of 3%Ni weathering steel to marine atmospheric corrosion. (1st May 2021)

• Record Type: Journal Article
• Authors: Wu, Wei; Dai, Zeyu; Liu, Zhiyong; Liu, Chao; Li, Xiaogang
• Is Part Of: Corrosion science. Volume 183(2021)
• Publication Date: 2021-05-01
• Subjects: 3%Ni steel -- Corrosion resistance -- Cu-Sb effect -- Corrosion product film -- Marine atmosphere; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.109353
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Corrosion of Cu-, Sb-, and (Cu + Sb)-microalloyed WSs is comparatively studied. There is a synergy between Cu and Sb to improve the corrosion resistance of 3%Ni WS. A (Cu, Sb, Ni)-enriched layer optimizes the compactness, composition and stability of CPF. Abstract: Various contents of Cu and Sb elements were incorporated into 3%Ni steel to enhance its corrosion resistance in a simulated tropical marine atmosphere of high salinity. The electrochemical process and the corrosion product film (CPF) properties were analyzed to evaluate the role of Cu and Sb and their synergistic effect. The results showed that there was a synergy between 0.5 % Cu and 0.2 % Sb, which improved the corrosion resistance of 3%Ni steel. This synergy produced a 45-μm-thick inner layer enriched with Cu, Sb and Ni, optimizing the properties of CPF significantly in terms of compactness, phase composition, elemental distribution and electrochemical activity.