Research on the corrosion resistance and the passive film growth of Ni-based superalloy surface treated by ultrasonic impact
Hairui Jiang,
Jianjun Guan,
Yan Zhao
et al.
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… Show more
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