Pitting Corrosion Resistance of Ta-Bearing Duplex Stainless Steel

被引：0

作者：

Kawamori1, Makoto ^{[1
]}

Kinugasa, Junichiro ^{[1
]}

Fukuta, Yuko ^{[1
]}

Shimamoto, Masaki ^{[1
]}

Sugimura, Tomoko ^{[1
]}

Katsuki, Yutaro ^{[2
]}

Nishizawa, Natsuki ^{[2
]}

Nagao, Mamoru ^{[2
]}

机构：

[1] Materials Research Laboratory, Technical Development Group, Kobe Steel, Ltd., Japan

[2] Research and Development Department, Maruichi Stainless Tube Co., Ltd, Japan

来源：

Zairyo to Kankyo/ Corrosion Engineering | 2020年 / 69卷 / 09期

关键词：

Aluminum corrosion - Corrosion resistance - Manganese oxide - Steel corrosion - Calcium compounds - Corrosion resistant coatings - Pitting - Tantalum compounds - Aluminum coatings - Aluminum compounds - Tantalum - Aluminum coated steel;

D O I：

10.3323/JCORR.69.237

中图分类号：

学科分类号：

摘要：

The effect of Ta addition on the pitting corrosion resistance of duplex stainless steels was investigated in both cases without and with deoxidization/desulfurization by addition of Al and Ca. The pitting corrosion resistance was improved by addition of Ta with two proposed mechanisms. For steels without Al and Ca, the MnS inclusions which act as initiation sites of the pitting corrosion are modified to the electrochemically-stable -Ta,Mn- oxysulfides. For steels with Al and Ca, the pitting initiation sites- CaS and- Al,Ca- oxides- are coated with the stable Ta-containing nitrides resulting in the suppression of pitting corrosion propagation. © 2020 Japan Society of Corrosion Engineering. All rights reserved.

引用

页码：237 / 245

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