等离子体处理对非晶态镍基合金镀层耐蚀性的影响

EFFECT OF PLASMA TREATMENT ON CORROSION RESISTANCE OF AMORPHOUS Ni-BASED ALLOY COATINGS

探讨低温低压微波等离子体处理对镍基非晶态合金镀层耐蚀性的影响,经过微波等离子体处理后的镀层在几种强酸介质中(H_2SO_4、HNO_3、HCI)和高温环境下,其耐蚀性和抗高温氧化性得到了很大提高。耐蚀性与微波等离子体处理的时间、功率有关系。

The effect of microwave plasma treatment on corrosion resistance of Ni-base amorphous alloy coatings (Ni-W, Ni-W-B, Ni-Mo-P) was investigated. It was found that the treatment improved their corrosion resistance in H2SO4, HNO3, HC1 solutions. The microwave plasma treated ammorphous Ni-W composite coatings (with 5wt% ZrO2 or Al2O3 particles) exhibited higher oxidation resistance during the heating at 700℃ for l-28h. As anodic polarization curve indicated, the microwave plasma treated amorphous Ni-W composite coating had wider passivity potential range. The corrosion resistance of Ni-base amorphous alloy coating was dependent on the power and time of microwave plasma treatment.