Corrosion behavior of wire arc additive manufactured and wrought 309 stainless steel in acidic solution

Corrosion Communications Pub Date : 2022-12-01 DOI:10.1016/j.corcom.2022.08.001

Atinuke Oladoye, Lawrence Osoba

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引用次数: 1

Abstract

In this study, 309 stainless steel (309SS) was fabricated by wire arc additive manufacturing (WAAM) process and characterized using optical microscopy and X-ray diffractometry. Corrosion behavior of WAAM 309SS in 1 mol/L H₂SO₄ solution at room temperature was investigated in comparison to that of wrought 309SS using electrochemical impedance spectroscopy, pontentiodynamic polarization, and immersion test. Mott-Schottky analysis, double loop electrochemical potentiokinetic reactivation (DLEPR) test and galvanic corrosion test using zero resistance ammeter (ZRA) technique were also conducted. The results showed that WAAM 309SS exhibited lower corrosion resistance than AISI 309SS due to microstructural differences engendered by the additive manufacturing process. Galvanic corrosion test showed that galvanic effect between the two stainless steels was minimal despite the microstructural differences while DLEPR test revealed the absence of chromium-depleted zones in both WAAM 309SS and AISI 309SS.

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丝弧添加剂制造和变形309不锈钢在酸性溶液中的腐蚀行为

本文采用电弧增材制造(WAAM)工艺制备了309不锈钢(309SS)，并用光学显微镜和x射线衍射仪对其进行了表征。采用电化学阻抗谱、电位动力学极化、浸渍试验等方法研究了WAAM 309SS在1 mol/L H2SO4溶液中的腐蚀行为，并与变形后的309SS进行了比较。并进行了Mott-Schottky分析、双回路电化学电位动力学再激活(DLEPR)测试和零阻电流表(ZRA)技术的电偶腐蚀测试。结果表明，由于增材制造工艺产生的显微组织差异，WAAM 309SS的耐蚀性低于AISI 309SS。电偶腐蚀试验表明，尽管两种不锈钢的显微组织存在差异，但两种不锈钢之间的电偶效应很小，而DLEPR试验表明，WAAM 309SS和AISI 309SS均没有缺铬区。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Communications

CiteScore

7.30

自引率

0.00%

发文量