A new method to obtain the repassivation time of passive materials based on the single particle impingement. (1st July 2020)

• Record Type: Journal Article
• Authors: Wang, Zhengbin; Sun, Chong; Li, Linlin; Roostaei, Morteza; Fattahpour, Vahidoddin; Mahmoudi, Mahdi; Zeng, Hongbo; Zheng, Yugui; Luo, Jing-Li
• Is Part Of: Corrosion science. Volume 170(2020)
• Publication Date: 2020-07-01
• Subjects: A. Alloy -- B. Potentiostatic -- B. Electrochemical calculation -- C. Repassivation; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2020.108717
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: A new method to obtain repassivation time of passive materials is proposed. Repassivation time of three passive materials is determined using the new method. The new method is reliable, universal and simple to compare repassivation property. Abstract: Repassivation time ( t re ) is a significant parameter when evaluating the repassivation property of material. Herein, we propose a new method to obtain t re by first theoretically unifying the repassivation current–time ( i ( t )) function for common film growth models, subsequently simplifying the unified i ( t ) function based on single particle impingement data, then deriving the completed repassivation current expression corresponding to t re using mathematical approximation methods, and finally verifying this method via comparing the obtained t re of three materials. The newly proposed method is reliable, universal and simple to compare repassivation properties of different materials without curve fitting and considering film growth mechanism.