2010•Light Alloy Fabrication TechnologyRequires access
Application of the electroless plating Ni-P coating on 7A04 aluminum alloy
Shi Yan-hua
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Abstract
In this paper,the solution composition and the operating parameters of electroless plating Ni-P coating on 7A04 aluminum alloy were investigated,and the surface and cross micrographs were observed.Moreover,the binding strength, microhardness,and corrosion resistance of Ni-P coating were tested,respectively.The experimental results showed that the Ni-P coating has a faster deposition velocity,and its crystal grains are uniform and compact.The binding strength between alloy and Ni-P is good.The microhardness of Ni-P coating is 9.6 times over that of 7A04 alloy.At the same time,the coating has a better corrosion resistance than 7A04 in w(NaCl) =3.5%NaCl solution.