以酒石酸为添加剂, 采用电沉积法制备了非晶态Cr-C合金镀层。用X射线衍射、扫描电子显微镜及能谱仪对镀层结构、形貌及成分进行表征, 并对镀层进行电化学耐腐蚀性测试。结果表明, 当酒石酸加入量为40 g/L时, 镀层的X射线衍射图出现非晶态的特征峰, 镀层表面平整、致密, 无裂纹和针孔, 与普通晶态Cr镀层相比, 非晶态Cr-C合金镀层具有更优良的耐腐蚀性能。

Amorphous Cr-C alloy coating was prepared by electrodepositing in tartaric acid additive bath. The microstructure, composition and surface morphology of the coating were detected by X-ray diffraction, SEM and EDS, also the microhardness, electrochemical corrosion resistance of the coating were tested. The results showed that a broad diffraction peak appeared on the X-ray diffraction pattern, the coating had a smooth and dense surface without pinhole and crack when the dosage of tartaric acid was 40 g/L. Compared with conventional crystalline Cr coating, amorphous Cr-C alloy coating had better corrosion resistance.