GALVANIC CORROSION FOR MAGNESIUM ALLOY COUPLED WITH DISSIMILAR METALLIC MATER0IALS DURING SALT SPRAY AND HUMIDITY CYCLE TEST
模拟大气环境中加速镁合金电偶腐蚀的研究

The galvanic corrosion behavior of magnesium alloy AZ91D coupled with dissimilar metal,including brass,aluminum alloy,316L stainless steel and A3 steel was investigated using accelerated testing in salt spray fog chamber and cyclic humidity apparatus.The results showed that:(1)magnesium alloy shows obviously corrosion sensitivity to the test environment;(2)The galvanic corrosion of magnesium alloy can be accelerated by many factors;(3)The concentration of salt and the relative areas of the large cathode coupled with a small magnesium alloy anode have an important effect on the accelerated galvanic corrosion in salt spray test.