ACCELERATED TESTS FOR SIMULATION OF ATMOSPHERIC CORROSION OF LC4 ALUMINUM ALLOY
LC4CS铝合金大气腐蚀模拟加速实验方法的研究

Periodic rain tests have been carried out for simulation of atmospheric corrosion of LC4CS aluminum alloy.The effects of drying time,raining time,wetting time,relative humidity,depolarizing agent,accelerating agent and pH of artificial rainwater on results of simulation and acceleration were analyzed by orthogonal experiments.Finally,favorable parameters were acquired,i.e.the composition of artificial rainwater is 0.05%NaNO_3+0.8%Na_2S_2O_8+4%NaCl,and the pH is 4,and the cycle time is 30 minutes,and the drying time of every cycle is 2 minutes,and the raining time of every cycle is 30 seconds,and the relative humidity(R.H.) of wetting is 70%.