Ni-P-Zn_3(PO_4)_2(ZnSnO_3、ZnSiO_3)纳米复合化学镀层性质和组成的研究

The Properties and Compositions of Ni-P-Zn3(PO4)2(ZnSnO3,ZnSiO3) Electroless Nanometer Composite Coatings

研究了温度、时间、浓度等对 A3钢片上 Ni-P-Zn3(PO4)2、 Ni-P-ZnSnO3和 Ni-P-ZnSiO3纳米复合化学镀层外貌的影响。用扫描电子显微镜（ SEM）观察外貌；称重法测定厚度；通过 10％ NaCl溶液、 1％ H2S气体加速腐蚀试验、 10％ CuSO4溶液点滴试验等多种手段测定其耐腐蚀性能；用 X-射线光电子谱 (XPS)及俄歇电子能谱 (AES)测定其价态及组成。结果表明：在最佳施镀条件下，可得光亮、致密、耐腐蚀性强于 A3钢、磷化膜及 Ni-P镀层的纳米复合化学镀层。镀层的原子百分组成约为 (％ )： Ni-P-Zn3(PO4)2： Ni 70.00,P 12.47,Zn3(PO4)2 13.93,C 3.6； Ni-P-ZnSnO3： Ni 77.56,P 10.00,ZnSnO3 9.84,C 2.6； Ni-P-ZnSiO3： Ni 83.00,P 10.96,ZnSiO3 5.15,C 0.89。

： In this paper the effects of temperature,nanoparticle concentration and plating time on composite coatings morphology were investigated by Scanning Electron Microscope(SEM).The physical chemistry natures of the Ni-P-Zn3(PO4)2,Ni-P-ZnSnO3 and Ni-P-ZnSiO3 coatings have been studied by weighting,accelerated corrosion tests,Auger Electron Spectroscopy(AES) and X-ray Photoelectron Spectroscopy(XPS).The results showed that the surfaces of the coatings are homogeneous,polished and with strong corrosion resistance which is superior to A3 steel specimen,nickel-phosphorus coating and phosphating film.For the Ni-P-Zn3(PO4)2,Ni-P-ZnSnO3 and Ni-P-ZnSiO3 coatings,the atomic percentage compositions(％ ) are Ni 70.00, P 12.47, Zn3(PO4)2 13.93,C 3.60;Ni 77.56,P 10.00,ZnSnO3 9.84,C 2.60 and Ni 83.00,P 10.96,ZnSiO3 5.15,C 0.89,respectively.