Double glow plasma surface metallurgy (DGPSM) technology was applied to obtain a Fe-Al-Cr coating on the surface of Q235 carbon steel. The influence of the sample temperature, gas pressure, the distance between the substrate, and the source electrode on the quality of the obtained Fe-Al-Cr coatings was systematically investigated. The results showed that the parameters for DGPSM have a significant effect on the uniformity, particle size, compactness, and thickness of the coating. Under the optimized parameters (sample temperature: 800 °C, gas pressure: 35 Pa, and electrode distance: 15 mm), the obtained Fe-Al-Cr coating contains Fe2AlCr, Fe3Al(Cr), FeAl(Cr), Fe(Cr) solid solution, Cr23C6, and α-Fe(Al), exhibiting excellent corrosion resistance in a 0.5 mol/L H2SO4 solution, which is even better than that of the 304 stainless steel.
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机译：施加双辉水等离子体表面冶金（DGPSM）技术在Q235碳钢表面上获得Fe-Al-Cr涂层。系统地研究了样品温度，气体压力，基板之间的距离和源电极对所得Fe-Al-Cr涂层质量的影响。结果表明，DGPSM的参数对涂层的均匀性，粒度，紧凑性和厚度具有显着影响。在优化的参数（样品温度：800°C，气体压力：35Pa和电极距离：15mm），所得Fe-Al-Cr涂层含有Fe2Alcr，Fe3Al（Cr），Feal（Cr），Fe（Cr ）固溶体，Cr23C6和α-Fe（A1），在0.5mol / L H 2 SO 4溶液中表现出优异的耐腐蚀性，其甚至比304不锈钢的溶液更好。
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