通过在同一镀液中改变温度、pH值和施加电流完成化学镀和电镀过程,在普通碳钢基体上得到电位差高于160mV的复合结构的非晶态Ni-P合金镀层.采用SEM、电化学测试设备及专门的腐蚀环境试验箱,研究了该复合镀层在H2S/CO2腐蚀气氛中的耐腐蚀行为.结果表明: 所制备的复合结构Ni-P非晶态镀层在H2S/CO2腐蚀环境中,100h后镀层表面出现均匀的硫化物腐蚀膜,300h后镀层表面出现腐蚀裂纹,并沿着与基体表面平行的方向扩展、剥离,在电镀层剥离处磷元素的相对含量增加.所制备的12μm厚的复合叠加结构Ni-P非晶态镀层的耐腐蚀性能优于25μm厚的普通化学Ni-P非晶态合金镀层.
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