Effect of Rhenium Addition on the Hot Corrosion Behaviour of Directionally Solidified Ni-Based Superalloys

Yang Wei; Liu Enze

doi:10.15980/j.tzzz.2015.07.032

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Effect of Rhenium Addition on the Hot Corrosion Behaviour of Directionally Solidified Ni-Based Superalloys
Vol. 35, Issue 7, Pages: 777-779(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.07.032

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[1]杨薇,刘恩泽.Re对定向凝固镍基高温合金热腐蚀性能的影响[J].特种铸造及有色合金,2015,35(07):777-779.

Yang Wei, Liu Enze. Effect of Rhenium Addition on the Hot Corrosion Behaviour of Directionally Solidified Ni-Based Superalloys. [J]. Special Casting & Nonferrous Alloys 35(7):777-779(2015)
[1]杨薇,刘恩泽.Re对定向凝固镍基高温合金热腐蚀性能的影响[J].特种铸造及有色合金,2015,35(07):777-779. DOI： 10.15980/j.tzzz.2015.07.032.

Yang Wei, Liu Enze. Effect of Rhenium Addition on the Hot Corrosion Behaviour of Directionally Solidified Ni-Based Superalloys. [J]. Special Casting & Nonferrous Alloys 35(7):777-779(2015) DOI： 10.15980/j.tzzz.2015.07.032.

摘要

研究了900℃熔盐腐蚀条件下含Re定向凝固镍基高温合金的腐蚀过程

探讨了合金的腐蚀机制。结果表明

添加Re增强了合金的热腐蚀抗力

加速了合金表面在腐蚀过程中形成致密氧化物保护层

减缓了合金腐蚀进程;同时Re会在合金腐蚀过程中形成强酸性氧化物

从而抑制了合金的碱性熔融腐蚀。

Abstract

Effects of Re addition on the hot corrosion behaviour of directionally solidified（DS）Ni-based superalloys in molten salt system at 900℃ were investigated

and corrosion mechanism was expounded.It is found that the hot corrosion resistance of alloy with Re addition is enhanced gradually.Re can accelerate the oxidation process and lead to a fast formation of protective oxide layer

inhibiting the corrosion of the superalloy.In addition

Re can also form strong acid oxides during corrosion process

which can prevent the alkaline fluxing corrosion.

关键词

Re热腐蚀定向凝固镍基高温合金

Keywords

RheniumHot CorrosionDirectionally Solidified Ni-Based Superalloys

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