Research on the Corrosion Resistance of Organic-Inorganic Nano Polysiloxane Coatings

Objective To study the corrosion resistance of organic-inorganic nano polysiloxane coatings. Methods According to the salt spray test method and salt solution alternate immersion test method,the accelerated corrosion tests were conducted on the coated samples with scratches. The maximum peeling value was used to quantitatively assess the peeling degree of coatings. Results Corrosion failure mode,corrosion degradation process,corrosion damage extent,and the change disciplinarian of corrosion damage extent with the accelerated corrosion time were obtained for the four kinds of coatings in the test environment. Conclusion The major failure mode of coatings in salt fog test was peeling,while the major modes in salt solution alternate immersion test were peeling and blistering. In the salt spray corrosion environment,3#coating had the best corrosion resistance,and in the alternate immersion corrosion environment,1#coating had the best corrosion resistance. Using the maximum peeling value to quantitatively assess the peeling degree of coatings was practical.