将钛酸钾晶须(平均长度15 μm,平均直径1.5 μm)加入含25 g/L NiSO_4·6H_2 Nickel-phosphorus composite coatings containing well-dispersed potassium titanate whiskers (PTWs) were prepared on Q235 steel sheet from an electroless plating bath comprising NiSO_4·6H_2O 25 g/L, NaH_2PO_2·2H_2O 25 g/L, CH_3COONa·3H_2O 15 g/L, Na_3C_6H_5O_7·2H_2O 35 g/L, lactic acid 20 mmol/L, lead acetate 10 μg/L, and PTWs with average length of 15 μm and average diameter of 1.5 μm. The oxidation resistance of the electroless composite coatings at high temperature was studied. The micrographs and structures of oxidation films were analyzed and the mechanism of oxidation resistance of the composite coatings was discussed. The results showed that the PTWs can improve the compactness of oxidation film and the composite coating has good oxidation resistance at high temperature.
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