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在化学镀非晶态Ｎｉ－Ｐ合金镀层表面涂覆溶胶－凝胶涂层，用来封闭镀层表面沉积过程中产生的针孔等缺陷，经过溶胶－凝胶涂层耐浓硝酸试验、５％ＮａＣｌ盐水浸渍试验，以及溶胶－凝胶涂层抗高温氧化性试验，得出结论：在化学镀Ｎｉ－Ｐ合金镀层表面涂覆溶胶－凝胶涂层，可以明显提高化学镀Ｎｉ－Ｐ合金镀层在硝酸、５％ＮａＣｌ盐水中的耐蚀性；在 ５００℃高温下，经过 １５０ｈ氧化处理，表面涂覆溶胶－凝胶涂层的抗高温氧化性可提高 ４倍。
Sol-gel coating is applied to the surface of electroless Ni-P alloy coating to seal the defects such as pinholes generated during the deposition of coating surface. After the sol-gel coating is resistant to concentrated nitric acid, 5% NaCl salt water immersion test and high temperature oxidation resistance test of sol-gel coating. It is concluded that sol-gel coating on electroless Ni-P alloy coating can obviously improve the electroless Ni-P alloy coating Corrosion resistance in nitric acid and 5% NaCl brine. The high temperature oxidation resistance of the surface-coated sol-gel coating can be increased by 4 times at 500 ℃ for 150 h.