Beryllium part passivating process

Abstract

The invention relates to a beryllium part passivating process comprising the following steps: 1, deoiling by an ultrasonic alcohol medium; 2, carrying out acid dipping treatment on the deoiled beryllium part; and 3, passivating. In the invention, the pretreatment procedure of the part is strengthened, and the chemical deoiling and acid dipping procedures are added, thus solving the problem of the wetting property of the part surface with a solution, and simultaneously improving the deoiling effect on small holes and deep grooves of the part; the formula and parameters of the acid dipping solution are determined by a large number of experiments, and the acid dipping solution can remove a natural passivating film but has a slight influence on the roughness of the part surface; and by removing the natural passivating film by a chemical method, the quality of the beryllium passivating film layer is improved, and a passivating film with good binding force and high quality can be generated.

Description

technical field [0001] The invention relates to a passivation process for beryllium parts. Background technique [0002] Metal beryllium is the lightest alkaline earth metal, with low density (2 / 3 of aluminum), high elastic modulus (5 times of aluminum), high specific rigidity (6.4 times of aluminum), small thermal expansion coefficient, and It has good stability and can maintain the original size of the product in the range of hundreds of degrees. Metal beryllium has become an excellent material for aircraft and missile structural parts. The main structural parts of platforms such as gyroscope, meter and table body in high-precision aerospace products at home and abroad are made of beryllium (RJY-40), and the parts of gyroscope and meter need to have certain anti-corrosion and decorative properties. Most foreign beryllium parts adopt passivation process to meet the needs of product performance, and beryllium passivation process is rarely recorded in domestic documents. I...