在304奥氏体不锈钢表面制备耐热防腐蚀层

Preparation of Heat and Corrosion Resistant Layer on 304 Austenitic Stainless Steel

以SUS304不锈钢为基材,通过电镀沉积镍和高温扩散处理的方法制备耐热防腐蚀层。用扫描电镜、X衍射仪、能谱仪等设备对耐热防腐蚀层进行分析。结果表明:经1050℃高温扩散30 min后,不锈钢表面的镀层由机械结合转化为冶金结合,镀层与基材的结合力显著提高。热震试验、盐雾试验和高温氧化试验结果证实,研制的镀层具有高的耐热防腐蚀性能。

The heat and corrosion resistant layer was prepared on the surface of SUS304 stainless steel by electric plating Ni and high-temperature diffusion. The properties of the layer were analyzed by scanning electron microscopy （SEM）, X-ray diffraction （XRD） and energy spectroscopy. The results showed that the plating on stainless steel transformed from mechanical binding to metallurgical binding and the binding force between coating and substrate was improved greatly after high-temperature diffusion at 1050 ~C for 30 rain. The results of thermal shock test,salt spray test and higln temperature oxidation test showed that the plating had high heat and corrosion resistance.