Abstract
In this study, we introduced different doses of silane coupling agent: 3-amino-propyltrimethoxysilane (APTMS) into commercial waterborne polyurethane (WPU) to prepare anti-corrosion coatings on galvanized steel sheets and explore their protective properties. In the gel content test, it was found that as the concentration of APTMS reached to higher than 5 phr, the degree of crosslinking was effectively increased. In the tape test, we found that the adhesion of all these WPU coatings passed the specifications. The pencil hardness test results show that the hardness of the coating also increased with the increase in APTMS concentration due to the increase in crosslinking degree. The copper sulfate test results show the same trend as the hardness test that the resistance to aqueous copper ions penetration increased with increased APTMS concentration. The contact angle test results show that the coating hydrophobicity increased with the APTMS concentration. Finally, the salt spray test results show that increasing the APTMS concentration could continuously improve the corrosion resistance of the coating within the concentration range of 8 phr.
Keywords
Corrosion Protective Coating, Crosslink, Silane Coupling Agent, Waterborne Polyurethane
Citations
IRE Journals:
Horng-Jer Tai , Hsin-Sheng Hsieh
"Anticorrosion Properties of Waterbrone Polyurethane/3-aminopropyltrimethoxysilane Coatings" Iconic Research And Engineering Journals Volume 8 Issue 1 2024 Page 9-13
IEEE:
Horng-Jer Tai , Hsin-Sheng Hsieh
"Anticorrosion Properties of Waterbrone Polyurethane/3-aminopropyltrimethoxysilane Coatings" Iconic Research And Engineering Journals, 8(1)
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