Corrosion Behavior of DP600 Dual Phase Steel in Two Accelerated Test Environments

被引：0

作者：

Lv L. ^{[1
]}

Zhou H. ^{[1
,2
]}

Xiao K. ^{[2
]}

Dan J. ^{[1
]}

Yao W. ^{[1
]}

Wu L. ^{[1
]}

Duan K. ^{[3
]}

机构：

[1] School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan

[2] Key Laboratory of Corrosion and Protection, University of Science and Technology Beijing, Beijing

[3] Beijing Foton Daimler Automobile Company, Beijing

来源：

Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2019年 / 33卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Corrosion rate model; Cyclic salt spray corrosion test; Dual phase steel; Metallic materials; Neutral salt spray test;

D O I：

10.11901/1005.3093.2019.288

中图分类号：

学科分类号：

摘要：

Corrosion behavior of DP600 dual phase steel in two different accelerated test environments, namely neutral salt spray (NSS) test and cyclic salt spray corrosion test (CCT) was comparatively assessed by means of SEM, EDS, XRD and EIS. Results show that the corrosion mass loss of the steel in the two environments was gradually increased, and the amount of mass loss in CCT was higher than in NSS test. At the same time, there was no significant difference in the initial corrosion rate, however the maximum corrosion rate reached 1.89 g•m-2•h-1 (NSS) and 2.72 g•m-2•h-1(CCT) at 480 h respectively. The rust layer of the steel after the NSS test composed of Fe3O4, α-FeOOH, γ-FeOOH, δ-FeOOH and α-Fe2O3, besides, there existed significant amount of β-FeOOH for the rust layer of the steel after CCT test. The rust layer of the steel after CCT test is thicker than that after NSS test, whilst the thickness increases faster for the former rust layer. The EIS results show that the resistance of sample solution and corrosion product film are gradually increased in both accelerated tests, furthermore the charge transfer resistance decreased first and then increased. The corrosion rate of the steel during NSS test and CCT test can be described as: ΔD 1-1=0.7349 t 0.1522 and ΔD 2-1=0.3511 t 0.3313 for the early stage (t≤480 h), while ΔD 1-2=14.6239 t - 0.3236 and ΔD 2-2=6.8542 t - 0.157 for the later stage (t>480 h) respectively. © All right reserved.

引用

页码：897 / 908

页数：11

共 26 条

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