三种预处理工艺对汽轮发电机铝合金部件表面结合力的影响

Effects of Three Pretreatment Methods on the Surface Adhesion of Epoxy Coating on Aluminum Alloy Parts of Turbine Generator Equipment

铝合金部件在火力发电设备中的应用十分常见。在发电运行环境中,铝合金部件的防护涂层的防护效果对其功能发挥有着重要的影响。本文对化学氧化、喷砂和使用万用环氧漆三种不同的预处理方法对涂层与铝合金(ZL102)之间结合强度的影响进行了研究。结果表明:三种预处理方式对涂层结合强度均有所提高,其中化学氧化处理最简便,但会产生化学废液污染;喷砂处理的工件涂层附着力最高,可达15MPa以上,且属于绿色工业手段,但其产生的应力和变形效果有待进一步研究;使用万用环氧漆的方法既简便又环保,无法喷砂处理的有色金属部件适合采用此种方法。

Aluminum alloy parts are very common in the application of turbine generator equipment,but its coating protection effect in the operating environment of power generation equipment is not reported.The effects of chemical oxidation,sand blasting and universal epoxy primer on the bonding strength between coating and aluminum alloy(ZL102)were studied in this paper.The results show that the three pretreatment methods can improve the bonding strength of the coating.The chemical oxidation treatment is the simplest,but it will produce chemical waste liquid pollution.The coating adhesion of the work piece treated by sand blasting is the highest,which is more than 15 MPa,and belongs to a green industrial means,but its stress and deformation effect need to be further studied.The method of using universal primer is simple and environmentally friendly.