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resistance, which will negatively affect the transmission of current and data signals. This can cause major problems in electromechanical contact
components used in the information processing technology. Causes for the formation of tarnish film on electrical contacts include for example the presence of corrosive gases such as H<sub>2</sub>S, SO<sub>2</sub>, NO<sub>x</sub>, O<sub>3</sub>, Cl<sub>2</sub>, and NH<sub>3</sub> <xr id="tab:Typical Corrosive Gas Concentrations (ppm) Near Industrial Facilities"/><!--(Tab. 13.4)--> in industrial environments.
<figtable id="tab:Typical Corrosive Gas Concentrations (ppm) Near Industrial Facilities">
Single components corrosive test atmospheres and testing with two gas exposures following each other provide only limited validity. Flowing gas test
atmospheres with four components have proven to be the most likely ones to realistically simulate long term natural corrosive gas exposure <xr id="tab:Typical Corrosive Gas Concentrations (ppm) Near Industrial Facilities"/><!--(Tab. 13.4)-->.
<figtable id="tab:Some Standardized Corrosion Tests for Electrical Contacts">
Methods, Nov. 2000
[[de:Prüfverfahren]]
