Why is it necessary to use nitrogen to maintain pressure in the coating pot liquid tank?
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Why is nitrogen used for pressure maintenance? Does nitrogen have a reducing effect?
Reply to 1# lpf2011: The coating tank liquid is an alkaline solution that is stored in a sealed stainless steel tank; no stirring is required, but nitrogen purging is necessary to prevent oxidation and the entry of impurities.
Reply to 2# 016910: Oh, I know that container is used to prevent oxygen from entering. But why is it necessary to use nitrogen for sealing? What is the role of nitrogen?
Does nitrogen not have any special functions? It’s just an inert gas.
Isolate oxygen. Coating kettle liquids are generally polyphenolic compounds. These polyphenols oxidize to quinone compounds when exposed to oxygen at room temperature. Quinone compounds are dark in color, ranging from red to blue to black.
Nitrogen is an inert gas that does not participate in reactions