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volvo vcs-1027, 14标准介绍
volvo vcs-1027, 14英文简介
this test procedure defines an accelerated corrosion test method, to be used in assessing the corrosion resistance of metallic materials, with or without corrosion protection, where there is a significant influence of chloride ions (e.g.; sodium chloride) from a marine source or road de-icing salt. this test is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.
test specimens are placed in an enclosed chamber and exposed to a changing climate that comprises of a 1 week duration main test cycle, which is composed of 2 x 12 hour sub-cycles, one with controlled humidity cycling (sub-cycle 1) and the other including salt application (sub-cycle 2). details as follows:
sub-cycle 1
step 1; 4.0 hours exposure to a constant climate of 95%rh at +35c. step 2; exposure to a changing climate during which the humidity is reduced to 50%rh and the temperature increased to +45c, linearly, over a period of 2.0 hours. step 3; 4.0 hours exposure to a constant climate of 50%rh at +45c. step 4; exposure to a changing climate during which the humidity is increased to 95%rh and the temperature reduced to +35c, linearly, over a period of 2.0 hours.
sub-cycle 2
on mondays & fridays sub-cycle 1 is replaced by the following;
step 1; spray with salt solution (from above) for 15 minutes. step 2; 1 hour & 45 minutes exposure to a constant climate of 95-99%rh at +35c (test specimens to remain wet throughout). steps 1 & 2 are then repeated in sequence twice to give a total period of 6.0 hours. step 3; drying in a changing climate during which the humidity is reduced to 50%rh and the temperature increased to +45c, linearly, over a period of 2.0 hours. step 4; 2.0 hours exposure to a constant climate of 50%rh at +45c. step 5; exposure to a changing climate during which the humidity is increased to 95%rh and the temperature reduced to +35c, linearly, over a period of 2.0 hours.
alternative sub-cycle 2
as an alternative to sub-cycle 2, samples may be completely immersed in salt solution instead of sprayed with salt solution, in which case step 1 of the above sub-cycle 2 is replaced with the following step;
step 1; immerse samples in salt solution for 15 minutes.
std1027, 14 is a volvo test standard.
q-fog盐雾试验箱用于volvo vcs-1027, 14 盐雾腐蚀测试的流程
▼volvo vcs-1027, 14第三方检测机构
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