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为了进一步提高Fe基非晶涂层的抗腐蚀性能,将不同比例Mo基合金粉末加入Fe基非晶粉末中,利用等离子喷涂技术获得涂层。通过XRD分析了涂层相组成,利用电化学分析和盐雾腐蚀等手段对涂层抗腐蚀性能进行测试。结果表明:加入Mo基合金粉末后等离子喷涂形成的涂层仍为非晶涂层。随着Mo基合金粉末加入,形成的涂层具有更低的腐蚀电流密度和较高的自腐蚀电位,同时存在较宽的钝化区域。当加入量增加20%时,腐蚀电流和电位不再发生明显变化,说明适量Mo基合金粉末加入能提高Fe基非晶涂层抗腐蚀性能。
In order to further improve the corrosion resistance of Fe-based amorphous coatings, different proportions of Mo-based alloy powders were added into the Fe-based amorphous powders and the coatings were obtained by plasma spraying. The phase composition of the coating was analyzed by XRD. The corrosion resistance of the coating was tested by means of electrochemical analysis and salt spray corrosion. The results show that the coating formed by plasma spraying after adding Mo-base alloy powder is still amorphous. With the addition of Mo-based alloy powder, the resulting coating has a lower corrosion current density and a higher self-corrosion potential, while a wider passivation zone exists. The corrosion current and potential no longer change obviously when the addition amount increases by 20%, which indicates that adding proper amount of Mo-based alloy powder can improve the corrosion resistance of Fe-based amorphous coating.