Research on the corrosion resistance and the passive film growth of Ni-based superalloy surface treated by ultrasonic impact

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Anti-corrosion Methods and Materials Pub Date : 2023-12-06 DOI:10.1108/acmm-09-2023-2899

Hairui Jiang, Jianjun Guan, Yan Zhao, Yanhong Yang, Jinglong Qu

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Abstract

Purpose

The purpose of this study is to investigate the corrosion resistance of superalloys subjected to ultrasonic impact treatment (UIT). The passive film growth on the superalloys’ surface is analyzed to illustrate the corrosion mechanism.

Design/methodology/approach

Electrochemical tests were used to investigated the corrosion resistance of GH4738 superalloys with different UIT densities. The microstructure was compared before and after the corrosion tests. The passive film characterization was described by electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS) tests.

Findings

The compressive residual stress and corrosion resistance of the specimens significantly increased after UIT. The order of corrosion resistance is related to the UIT densities, i.e. 1.96 s/mm² > 1.71 s/mm² > 0.98 s/mm² > as-cast. The predominant constituents of the passive films are TiO₂, Cr₂O₃, MoO₃ and NiO. The passive film on the specimen with 1.96 s/mm² UIT density has the highest volume fraction of Cr₂O₃ and MoO₃, which is the main reason for its superior corrosion resistance.

Originality/value

This study provides quantitative corrosion data for GH4738 superalloys treated by ultrasonic impact. The corrosion mechanism is explained by the passive film’s characterization.

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超声冲击处理镍基高温合金表面的耐蚀性及钝化膜生长研究

目的研究高温合金经超声冲击处理后的耐腐蚀性能。分析了高温合金表面钝化膜的生长情况，阐述了钝化膜的腐蚀机理。设计/方法/方法采用电化学试验研究了不同密度的GH4738高温合金的耐蚀性。对比了腐蚀试验前后的微观组织。通过电化学阻抗谱(EIS)和x射线光电子能谱(XPS)测试描述了钝化膜的表征。结果:经高温压缩处理后，试样的残余压应力和抗腐蚀性能明显提高。合金的耐蚀等级与合金密度有关，铸态为1.96 s/mm2 > 1.71 s/mm2 > 0.98 s/mm2 >钝化膜的主要成分是TiO2、Cr2O3、MoO3和NiO。当UIT密度为1.96 s/mm2时，钝化膜中Cr2O3和MoO3的体积分数最高，这是钝化膜具有优异耐蚀性的主要原因。本研究为超声波冲击处理的GH4738高温合金提供了定量的腐蚀数据。钝化膜的特性解释了钝化膜的腐蚀机理。

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.