为了获得耐蚀性能优异的复合化学镀层,利用中性化学复合镀技术,在A3碳钢片表面制备了金黄色光亮致密的Cu-Sn-P-ZnCr2S4和Cu-Sn-P-CdCr2S4纳米复合化学镀层.用扫描电子显微镜(SEM)观察了镀层外貌;以称重法测定厚度;通过5%NaCl溶液、1%H2S气体加速腐蚀试验、抗粘性试验及室温氧化试验等多种手段测定了其性能;用X射线光电子谱(XPS)及俄歇电子能谱(AES)测定了其价态及组成.结果表明:Cu-Sn-P-ZnCr2S4(CdCr2S4)纳米复合材料镀层的性能优于Cu-Sn-P合金镀层,复合镀层Cu-Sn-P-ZnCr2S4中,各原子百分数(%)约为: Cu 68.00,Sn 3.50,P 6.90,Zn 2.10,Cr 4.20, S 8.40,C 6.80;Cu-Sn-P-CdCr2S4中:Cu 69.00,Sn 3.30,P 5.90,Cd 2.4,Cr 4.8, S 9.60,C 4.80.Cu-Sn-P-ZnCr2S4占镀层的93.10%,Cu-Sn-P-CdCr2S4占镀层的95.00%.所得镀层耐蚀性好,耐盐水及室温氧化性能均优于Q235钢片和相近厚度的Cu-Sn-P合金镀层.
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