Effects of Fe3+ on the Corrosion Behavior of High-Purity Aluminum in Neutral Solutions Containing Cl-

被引：9

作者：

Shinozaki, Ippei ^{[1
]}

Sakakibara, Yohei ^{[1
]}

Nakayama, Gen ^{[1
]}

Tada, Eiji ^{[2
]}

Ooi, Azusa ^{[2
]}

Nishikata, Atsushi ^{[2
]}

机构：

[1] IHI Corp, Technol Platform Ctr, Yokohama, Kanagawa 2358501, Japan

[2] Tokyo Inst Technol, Dept Mat Sci & Engn, Tokyo 1528552, Japan

来源：

MATERIALS TRANSACTIONS | 2021年 / 62卷 / 04期

关键词：

FeCl3; immersion test; dissolution; general corrosion; passivation; pitting corrosion; GALVANIC CORROSION; PURE ALUMINUM; CHLORIDE-ION;

D O I：

10.2320/matertrans.MT-M2020254

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the effects of Fe3+ on corrosion behavior of high-purity aluminum (Al) were investigated in aqueous NaCl solutions containing Fe3+ using immersion tests, electrochemical analysis, and surface observations. For high-purity Al immersed in an Fe3+ solution, the open circuit potential was much lower and the corrosion rate was higher than that of high-purity Al in a solution without Fe3+. The corrosion morphology of high-purity Al after immersion in the test solutions containing Fe3+ was mainly general corrosion; this differed significantly from the morphology of the Al immersed in a NaCl solution without Fe3+. The effects of Fe3+ on the corrosion behavior of high-purity Al were due to a less-protective passive film composed of Al(OH)(3) and Fe(OH)(3) that formed on high-purity Al during immersion.

引用

页码：492 / 497

页数：6

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