Atmospheric corrosion tests consist in the exposure of samples to atmospheric conditions at test-sites and in their periodic evaluation. To expose materials and their surface coatings to all factors of atmospheric environment is only possible by their exposure to a realistic environment whilst studying all parameters of that environment. The performance of corrosion testing is experimentally and time demanding. Continual measurements of environmental parameters - temperature, humidity, sun radiation, amount of rainfall, Pollution by SO2, NOx and O3, pH and conductivity of rainfall, content of chlorides, sulfates and nitrates in rainfall are carried out. Due to a slow rate of atmospheric corrosion it is recommended for the exposure to last for 1 year, 2 years, 5 years, 10 years or 20 years according to the corrosion stability of a tested material.
Picture: Test-site in Czech Republic
Source: http://www.svuom.cz/index.php?zobraz=atmzkusebst&lang=en
1 comment:
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