To enhance the corrosion resistance of directional structure coating of Ni60 alloy, the directional structure composite coating of Ni60 alloy reinforced with WC was prepared on the S45C steel by the induction remelting and forced cooling method. The immersion corrosion behaviors of coatings in 10% H₂SO₄ solution for 168 h and its electrochemical corrosions were investigated to analyze its corrosion resistance. The results showed that WC changed the grain boundary density and grain boundary type, having important effect on corrosion resistance and corrosion mechanism of directional structure Ni60 coating. The corrosion potentials of directional structure Ni60 coating and Ni60/WC coating is −0.395 and −0.112 V, respectively. The corrosion resistance of directional structure Ni60/WC coating is better than that of the coating without WC. The corrosion mechanism of directional structure Ni60/WC coating is slight intracrystalline corrosion, while the coating without WC is the pitting corrosion and the microgalvance corrosion.

为了提高Ni60合金定向结构涂层的耐蚀性，采用感应重熔和强制冷却方法在S45C钢上制备了WC增强的Ni60合金定向结构复合涂层。涂层在10％H ₂ SO _4中的浸入腐蚀行为研究了溶液168小时及其电化学腐蚀，以分析其耐腐蚀性。结果表明，WC改变了晶界密度和晶界类型，对定向结构Ni60涂层的耐蚀性和腐蚀机理具有重要影响。定向结构Ni60涂层和Ni60 / WC涂层的腐蚀电位分别为-0.395和-0.112V。定向结构的Ni60 / WC涂层的耐蚀性优于无WC的涂层。定向结构Ni60 / WC涂层的腐蚀机理是轻微的晶内腐蚀，而无WC的涂层是点蚀和微晶格腐蚀。