Methods for Improving the Coating adhesion of Chrome Plating on TC6 Titanium Parts

Titanium and titanium alloys have a high strength-to-mass ratio, excellent corrosion resistance, and good mid-temperature performance. They have been widely used in various fields, especially the aerospace industry. 12. However, due to their poor wear resistance, the surface is easy to scratch and stick. Shortcomings such as poor connection and poor welding performance limit its application range. At home and abroad, the electroplating process is usually used for surface treatment of titanium and titanium alloys in order to improve the surface properties of titanium. Hori gave its new physical properties and expanded the scope of application. For example, chromium plating or electroless plating on titanium and titanium alloys can increase the surface hardness and improve wear resistance; copper or silver plating can improve the surface condition of parts under high temperature load conditions, preventing glue bonding and micro-seismic corrosion. This is very important for titanium parts connected by mechanical methods, such as compressor discs, blades, etc.; in the aerospace industry, gold-plating titanium parts can improve their surface light reflection performance; copper or nickel plating can be changed to titanium Brazing performance 3. Titanium is a very active metal, but usually titanium and titanium alloys show stable properties. This is because titanium has a strong affinity with oxygen and nitrogen in the air and is easy to form on its surface. A thin and dense passivation film. When titanium alloy electroplating, in order to obtain a coating with good bonding force, it is necessary to completely remove the passivation film on the surface, but the oxidation rate of titanium is very fast, and the passivation film will be regenerated when the passivation film is removed. Excellent resistance