富锌防腐涂层在煤矿设备的应用及防腐机理研究

Corrosive protection mechanism of Zinc-rich coatings and application in coal mining equipment

通过盐雾、浸泡、电化学测试以及现场试验,对自制环保无机富锌底漆涂层(KD)和不同涂装体系[自制底漆+中间漆+面漆(KDZY)、市场底漆+中间漆+面漆(ZYQT)、自制底漆+水性中间漆+水性面漆(KDSX)、自制底漆+面漆(KDSM)]进行了腐蚀防护性能测试与机理研究。研究结果表明,自制无机富锌底漆涂层在盐雾环境中有优异的耐腐蚀性能,其腐蚀防护机理为阴极保护、物理屏蔽及自愈合功能。因此,由自制无机富锌涂层作为底漆构成的KDZY、KDSX涂装体系的耐盐雾腐蚀性能也更为优异。ZYQT和KDZY涂装体系在氯离子环境中绝缘性好、电阻大,具有较好的防护性能。在煤矿井下综采环境中,ZYQT涂装体系具有良好的腐蚀防护性能。所有的涂装体系的耐水浸泡性能较差,不适于长期在矿井水中浸泡。

Corrosive protection performance of self-made inorganic Zinc-rich primer coating(KD) and different corrosion protection coating systems [KD + intermediate + finish paint(KDZY),commercial primer + intermediate + finish paint(ZYQT),KD + water based intermediate + finish paint(KDSX)and KD + commercial finish paint(KDSM) ] were tested and analyzed by salt spray,immersion,electrochemical tests and field experiment.The results show that the self-made inorganic Zinc-rich primer coating KD presents excellent corrosive protection in the salt spray test.Its corrosive protection mechanisms include cathodic protection,physical shielding and self-healing function.The KDZY and KDSX coating systems based on KD primer also have good corrosive protection in the salt spray test.The ZYQT and KDZY coating systems have good protection for Cl-penetrating due to high resistor and better insulation.The ZYQT coating system manifests good corrosion protection in coal mining environment.All coating systems show poor water immersion resistance,so the coating systems are not suitable for a long time application in water immersion condition.