新型高錳奧氏體合金耐液鋅的腐蝕機理

張藝; 劉俊友; 田廣新; 李偉; 劉杰

doi:10.13374/j.issn1001-053x.2009.10.012

新型高錳奧氏體合金耐液鋅的腐蝕機理

doi: 10.13374/j.issn1001-053x.2009.10.012

1. 北京科技大學材料科學與工程學院, 北京 100083;
2. 北科德瑞冶金工程技術有限公司, 北京 100083

基金項目:

“耐液態鋁鋅硅高溫腐蝕的新合金材料”中小企業創新基金資助項目(No.07KW1003)

詳細信息

作者簡介:
張藝(1983-),女,博士研究生;吳春京(1961-),男,教授,博士生導師,E-mail:cjwu@mater.ustb.edu.cn

中圖分類號: TG174.2⁺2
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出版歷程
- 收稿日期: 2009-02-25
- 網絡出版日期: 2021-08-09

Corrosion mechanisms of a new-type high-manganese austenitic alloy in a molten zinc bath

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing BKDR Metallurgy Engineering & Technology Co. Ltd., Beijing 100083, China

摘要

摘要: 對自制的一種新型高錳奧氏體耐液鋅腐蝕合金在490℃的熔融純鋅液中的腐蝕行為進行了系統的研究,并探討了其耐液鋅腐蝕機理.結果表明,與316L不銹鋼相比,新型高錳奧氏體合金具有更好的耐液鋅蝕能力,其腐蝕速率為6.42×10^-4g·cm^-2·h^-1,而316L不銹鋼的腐蝕速率為1.54×10^-3g·cm^-2·h^-1.新型高錳奧氏體合金在鋅液中的最終腐蝕產物為Γ相+δ相+ζ相,而316L不銹鋼的腐蝕產物幾乎全是ζ相.新型高錳奧氏體合金的腐蝕產物中δ相固溶了質量分數在8.5%左右的Cr,Cr的存在使得δ相穩定性增加,致密的富含Cr的δ相的存在減緩了鐵、鋅反應速率,提高了新型高錳奧氏體合金的耐液鋅腐蝕能力.因此,以錳代鎳來制取低成本的新型高錳奧氏體耐液鋅腐蝕合金具有可行性.
- 奧氏體合金 /
- 錳 /
- 腐蝕 /
- 熔融鋅液
Abstract: A new-type high-manganese austenitic alloy for immersed rolls in continuous hot-dip coating lines was developed.The corrosion behaviors of the high-manganese austenitic alloy in molten zinc at 490℃ were systematically studied in order to better understand the reaction mechanism.The results indicated that the high-manganese austenitic alloy showed a better corrosion resistance than 316 L stainless steel.Its corrosion rate in molten zinc was calculated to be approximately 6.42×10^-4 g·cm^-2·h^-1,but 1.54×10^-3 g·cm^-2·h^-1 for 316 L stainless steel.The ultimate corrosive products of the high-manganese austenitic alloy were Γ,δ and ζ phases,while that of 316 L stainless steel was almost ζ phase.δ phase in the high-manganese austenitic alloy contains about 8.5% Cr,and the existence of Cr improves the stabilization of δ phase.This δ phase with enrichment of Cr acts as a barrier slowing down the reaction of Fe and Zn,and improves the corrosion resistance of the high-manganese austenitic alloy.Substituting manganese for nickel to manufacture a high-manganese austenitic alloy of low cost is feasible.
- austenitic alloy /
- manganese /
- corrosion /
- molten zinc