摘要
利用激光合金化技术在Cr12钢表面制备了MoSi_(2)涂层,探讨了激光功率和扫描速度对涂层的影响,研究了MoSi_(2)涂层腐蚀性能。结果表明:激光功率较低时,扫描速度的改变对合金层深度影响小,随着激光功率的增加和扫描速度的降低,合金层宽度和深度呈增加趋势。质量分数3.5%NaCl溶液中的电化学腐蚀表明,Nb元素的添加,增大了合金层中固溶体的晶格畸变程度,造成MoSi_(2)涂层的自腐蚀电位降低,但在涂层表面形成一层耐腐蚀的钝化膜,出现明显的钝化现象,提高了涂层的自腐蚀电流。
MoSi_(2) coating was prepared on the surface of Cr12 Steel by laser alloying technology.The effects of laser power and scanning speed on the coating were discussed,and the corrosion properties of MoSi_(2) coating were studied.The results show that the change of scanning speed has little effect on the depth of alloy layer as the laser power is low.With the increase of laser power and the decrease of scanning speed,the width and depth of alloy layer increase.The electrochemical corrosion results of the species in the solutions of 3.5%NaCl show that the addition of Nb can increase the lattice distortion of the solid solution in the alloy layer,resulting in a decrease in the self-corrosion potential of the MoSi_(2) coating.Nb element promotes the formation of a corrosion-resistant passivation film on the surface of the coating,resulting in obvious passivation,which increases the self-corrosion current of the coating.
作者
王洪金
孙顺平
潘强
李小平
于赟
Wang Hongjin;Sun Shunping;Pan Qiang;Li Xiaoping;Yu Yun(School of Materials Engineering,Jiangsu University of Technology,Changzhou 213001,China)
出处
《山东化工》
CAS
2023年第1期37-39,共3页
Shandong Chemical Industry
基金
国家自然科学基金(52171003)
江苏省高校自然科学研究项目(17KJA430006)。
