Research on Influence of Deionized Water on the Surface Quality of 2A14 Aluminum Alloy Fuel Tank
To access the influence of deionized water on the surface quality of 2A14 aluminum alloy fuel tank of launch vehicle,and prevent the corrosion of the aluminum material,the cyclic soak test of specimens in pressured deionized water and damp heat test is conducted in this paper.Results show that specimens under cyclic soak test in pressured deionized water have no sign of surface corrosion,the deionized water can be used for pressure test and cubage test of 2A14 aluminum alloy fuel tank without high temperature and high humidity;deionized water leads to equal corrosion resistance of 2A14 aluminum specimens compared with potassium dichromate solution and more corrosion resistance of 5A06 aluminum specimens compared with potassium dichromate solution.