Spray paint coating S420ML steel plate corrosion mechanism

Tell commonly, S420MLsteel plate corrosion is the result of joint action of many factors, of which some factors plays an important role in the process of corrosion. S420MLsteel plate surface spray coating layer formation, its corrosion area is on the surface of the coating film with S420ML interface area, and constantly to S420MLsteel deep plate substrate corrosion expansion.

If S420MLsteel plate surface spray coating layer can effectively isolate water, oxygen and electronics, stray ion penetration, can greatly reduce or avoid coating of metal corrosion, if isolation effect is not good, the layer of coating to S420MLsteel anti-corrosion plate corrosion protection is bad. Production practice showed that the spray coating protective effect on water permeability of severe metal spray paint coating surface adhesion, and oxygen permeability is largely affect the corrosion of metals. Spray coating of metal corrosion form varied, but the root cause, corrosion, happens and the chemical and electrochemical effects have close relationship.

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