![]() ![]() None of these factors can be singled out as the main contributor to corrosion. The performance of atmospherically exposed metals depends on five main factors: temperature, humidity, rainfall, sulfur dioxide (pollution) concentration in the air, and air salinity. As steel, copper, magnesium, aluminum, et al are exposed to the atmosphere, they react with free flowing air and moisture to develop oxides. The most common exposure environment for metallic corrosion is atmospheric. Here is a little more detail about steel corrosion rates in various environments. This makes developing a chart predictive of corrosion rates for any specific location extensive and sometimes costly, and why many corrosion rate charts exist, but only for unique locations and conditions. For example, corrosion in water must consider factors such as oxygen content, the extent of agitation, wave action, temperature, chloride levels and more. For example, the pH, moisture content, and chloride level are just three of the variables determining the corrosion rate of galvanized steel in soil.Ĭorrosion charts are difficult to develop because of the many variables present in any given micro-environment. ![]() Corrosion of carbon steel and even alloy steels in micro-environments can be very complex. ![]()
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