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Enhancement of Wear and Corrosion Resistance of M2052 Damping Alloys by Electroless Plating Ni–P Coating
ISIJ International ( IF 1.8 ) Pub Date : 2020-10-20 , DOI: 10.2355/isijinternational.isijint-2019-797
Guang Chen 1 , Jun Wang 1 , Ling Xue 1 , Zhaohua Huang 2
Affiliation  

M2052 is a famous high damping Mn–Cu alloys with good strength, but lack of well corrosion and wear resistance. In this study, we expect to enhance the wear and corrosion resistance of M2052 damping alloys by electroless plating Ni–P coating. Successfully, a high phosphorus amorphous Ni–P coating with thickness about 15 µm plated on M2052 substrate. After electroless plating Ni–P coating, the roughness of samples surface decreased and the microhardness increased. Thus, the coated sample featured better wear resistance, and attributed to adhesive wear mechanism. By contrast, the friction coefficients of uncoated samples presented a high value with great fluctuations, which due to low hardness, high roughness, and easier to be oxidized. This leads to the dominant wear mechanisms are abrasive and corrosive wears. Ni–P coating significantly improved the corrosion resistance, because it has lower Icorr, higher Ecorr, and higher impedance than M2052 substrate. Surface morphologies after electrochemical tests were also observed: the uncoated samples had been corroded severely with a fibrous corrosion product layer dispersing cracks and pits. However, coated samples had not been corroded and remains intact. Furthermore, Mott–Schottky plots inferred that the sample surface after plating Ni–P coating performed an excellent passivation behavior in NaCl solution.



中文翻译:

化学镀Ni-P涂层可增强M2052阻尼合金的耐磨性和耐蚀性

M2052是著名的高阻尼Mn-Cu合金,具有良好的强度,但缺乏良好的腐蚀和耐磨性。在这项研究中,我们期望通过化学镀Ni-P涂层来增强M2052阻尼合金的耐磨性和耐腐蚀性。成功地制成了厚度约为15 µ的高磷非晶态Ni-P涂层m镀在M2052衬底上。化学镀镍-磷涂层后,样品表面的粗糙度降低,显微硬度提高。因此,涂覆的样品具有更好的耐磨性,并归因于粘合剂的磨损机理。相比之下,未涂层样品的摩擦系数呈现高值且波动很大,这归因于硬度低,粗糙度高和易于氧化。这导致主要的磨损机制是磨蚀和腐蚀磨损。Ni-P涂层具有较低的I corr和较高的E corr,因此大大提高了其耐腐蚀性。,并且比M2052基板具有更高的阻抗。还观察到电化学测试后的表面形态:未涂覆的样品已被严重腐蚀,其纤维状腐蚀产物层分散了裂缝和凹坑。但是,涂覆的样品并未被腐蚀并且保持完整。此外,Mott-Schottky曲线推断出,镀Ni-P涂层后的样品表面在NaCl溶液中表现出优异的钝化行为。

更新日期:2020-10-28
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