MICROSTRUCTURE AND EROSION CORROSION PROPERTY OF CrNi ALLOYED COATING ON CARBON STEEL

Shouying Li and Zhaoqing Lin ()
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Shouying Li: School of Intelligent Manufacturing, Yancheng Polytechnic College, Yancheng 224005, Jiangsu, P. R. China†School of Mechanical and Electronic Engineering, Qingdao Binhai University, Qingdao 266555, Shandong, P. R. China
Zhaoqing Lin: School of Intelligent Manufacturing, Yancheng Polytechnic College, Yancheng 224005, Jiangsu, P. R. China

Surface Review and Letters (SRL), 2024, vol. 31, issue 08, 1-9

Abstract: In this study, CrNi alloyed coating was deposited on Q235 low carbon steel by arc-added glow plasma depositing technique in order to increase the corrosion resistance property. It was found that the CrNi alloyed coating was composed of face-centered cubic Cr0.7Ni2.9Fe0.36 phase. The EDS results indicated that 7.3 μm coatings were prepared which was bonded metallurgically with the substrate. The salt spray corrosion test result showed that the corrosion product film of coating was dense while the corrosion film of carbon steel was multilayered in morphology. The corrosion product film of CrNi coating reduced the corrosion rate. However, the corrosion product of Q235 with loose multi-layer structure increased corrosion process. The erosion corrosion properties of carbon steel and coating were tested in NaCl solution with different flowing speed through electrochemical test methods. The erosion corrosion results showed that the corrosion rate of carbon steel was increased in flowing NaCl solution. The corrosion product of CrNi coating could protect inner material in NaCl solution at flowing speed of 2 m·s−1 to 6 m·s−1.

Keywords: Carbon steel; CrNi coating; erosion corrosion (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1142/S0218625X2450063X

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