Corrosive protection mechanism of Zinc-rich coatings and application in coal mining equipment
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摘要: 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。Abstract: 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.
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Key words:
- corrosive protection /
- Zinc-rich coating /
- salt spray test /
- mine water /
- electrochemistry
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[1] Craig P.Investigations into the corrosive environments contributing to premature failure of Australian coal mine rock bolts[J].International Journal of Mining Science and Technology,2016,26(1):59-64. [2] 程瑞珍,袁训华.煤矿工程设备防护[M].北京:化学工业出版社,2014:1-5. [3] Marchebois H.Zinc-rich powder coatings characterisation in artificial sea water[J].Electrochimical Acta,2004,49(11):1719-1729. [4] 刘登良.重防腐涂料及其在工程中的应用[J].现代涂料与涂装,2000(5): 31-33. [5] Liu Dengliang.Heavy anti-corrosion coating and its application in engineering [J].Modern Paint and Finishing,2000(5):31-33. [6] Zhang L.Anti-corrosion performance of waterborne Zn-rich coating with modified silicon-based vehicle and lamellar Zn (Al) pigments[J].Progress in Natural Science:Materials International,2012,22(4):326-333. [7] Ghosh S K,Waghoo G,Kalita A,et al.Chloride-free biodegradable organic acid hydrolyzed Zinc silicate coating[J].Progress in Organic Coatings,2012,73(1):70-75. [8] 应柳枝,许丽梅,张晓明,等.水性无机富锌涂料的防腐性能研究[J].表面技术,2009,38(6):48-50. [9] Ying Liuzhi,Xu Limei,Zhang Xiaoming,et al.Corrosion resistance of waterborne inorganic Zinc-rich paint[J].Surface Technology,2009,38(6):48-50. [10] 刘旭文,熊金平,曹京仪,等.EIS法研究3种配套涂层体系的腐蚀电化学行为[J].化工学报,2008,59(3):659-664. [11] Liu Xuwen,Xiong Jinping,Cao Jingyi,et al.Study electrochemical corrosion behavior of three coating systems by EIS[J].Chemical Technology,2008,59(3):659-664. [12] 孔凡静.利用EIS研究几种单涂层和复合涂层在不同条件下的腐蚀失效行为[D].北京:北京化工大学,2012. [13] 李敏风,顾薇霞,胡唐骏.富锌底漆及其涂装[J].现代涂料与涂装,2009,12(04):51-56. [14] Li Minfeng,Gu Weixia,Hu Tangjun.Zincrich primer and painting[J].Modern Paint and Finishing,2009,12(04):51-56. [15] 潘俊艳.综采设备结构件的腐蚀机理与防护技术研究[D].北京:中国矿业大学(北京),2016. [16] 中华人民共和国国家质量监督检疫总局,中国标准化管理委员会.GB/T 10125—2012人造气氛腐蚀试验盐雾试验[S].北京:中国标准出版社,2013. -
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