Properties of Electroless Ni-B and Ni-P/Ni-B Coatings Formed on Stainless Steel

摘要

In this study, Ni-P/Ni-B duplex coatings and Ni-B single layer were deposited on 410 stainless steel by the electroless process. The surface morphology and cross section observations were analyzed using scanning electron microscopy and optical microscopy. The results showed that by using the Ni-high P layer under the Ni-B deposit, the hardness value was increased. Also, the surface roughness of Ni-high P/Ni-B duplex coating was lower than the surface roughness of the Ni-B single layer. In addition, by using the Ni-high P layer as an intermediate layer prior to Ni-B coating, the surface morphology could be compressed. The mass loss diagram and the worn surfaces indicated that the Ni-high P/Ni-B duplex coating was the best wear resistant among the other coatings.