高强钢表面水性无机磷酸盐防护涂料的制备与性能研究

发布时间：2018-06-28 21:56

本文选题：高强钢 + 无机磷酸盐涂料　；参考：《南京航空航天大学》2016年硕士论文

【摘要】：针对高强钢耐腐蚀性较差的问题,本文研究了一种水性无机磷酸盐表面防护涂料底漆与面漆,并采用空气喷涂的方式分别将底漆与面漆涂料涂敷到高强钢基体表面,制备出一种耐腐蚀、抗高温氧化的含铝磷酸盐防腐涂层。采用正交试验法优化底漆面漆涂料配方,并对涂层的表观形貌,涂层的厚度、硬度、附着力、耐磨性能等综合性能进行测试,采用中性盐雾试验、模拟海水全浸泡试验、电化学测试对涂层在常温环境中的耐腐蚀性能进行分析,采用600℃高温氧化试验对涂层在高温环境中的抗高温氧化性能进行分析与研究。研究结果表明:采用正交试验法优化的底漆涂料最佳配方为蒸馏水:磷酸二氢铝:氧化锌:氧化镁:铬酸镁:铝粉=30:15:0.4:0.4:3.0:36;面漆涂料最佳配方为蒸馏水:磷酸二氢铝:氧化锌:氧化镁:铬酸镁:铝粉:正硅酸四乙酯=15:15:0.4:0.4:2.4:4.5:0.6。涂料的固化工艺为120℃固化2h后升温至220℃固化17h。制备出的底漆面漆共同涂覆涂层厚度为117.4μm,涂层附着力为10.66MPa,涂层硬度为3H。防腐性能测试结果表明:中性盐雾试验1000h后涂层保持稳定,表面无腐蚀产物形成;模拟海水全浸泡试验21d后,涂层表面未发生明显腐蚀,局部出现锈点;电化学测试中,涂层的自腐蚀电位明显高于基体,涂层的容抗弧幅值大于基体。涂层具有优异的耐腐蚀性能,在常温腐蚀环境中能够对高强钢基体形成有效防护。600℃抗高温氧化试验结果表明在高温氧化试验100h后涂层的氧化增重远小于高强钢基体,在试验过程中涂层的氧化速度始终低于基体,抗高温氧化等级为完全抗氧化性,具有优异的抗高温氧化性能。
[Abstract]:In order to solve the problem of poor corrosion resistance of high strength steel, a kind of water-based inorganic phosphate surface coating primer and topcoat was studied, and the primer and topcoat coating were applied to the surface of high strength steel respectively by air spraying, and a corrosion resistant and high temperature oxygen resistant phosphate anticorrosion coating was prepared. The orthogonal test was used. The formulation of the paint coating was optimized. The apparent morphology of the coating, the thickness of the coating, the hardness, the adhesion and the wear resistance of the coating were tested. The neutral salt spray test was used to simulate the full immersion test of the seawater. The corrosion resistance of the coating in the ambient temperature environment was analyzed by electrochemical test. The coating was applied to 600 C high temperature oxidation test. The performance of high temperature oxidation resistance in high temperature environment is analyzed and studied. The results show that the best formula for the primer coating optimized by orthogonal test is distilled water: two hydrogen phosphate: Zinc Oxide: Magnesium Oxide: magnesium chromate: aluminum =30:15:0.4:0.4:3.0:36; the best formula for the surface paint is distilled water: two aluminum phosphate: Zinc Oxide: Zinc Oxide: Magnesium Oxide Magnesium chromate: aluminum powder: the curing process of four ethyl orthosilicate =15:15:0.4:0.4:2.4:4.5:0.6. coating is 120 C for 2h solidified after curing to 220 C, the coating thickness of the base paint coating is 117.4 mu m, the coating adhesion is 10.66MPa, the coating hardness is 3H. anticorrosive ability test results show that the neutral salt fog test 1000h post coating In the simulated seawater immersion test for 21d, the coating surface has no obvious corrosion and local rust points. In electrochemical testing, the self corrosion potential of the coating is obviously higher than that of the matrix, and the amplitude of the coating's tolerance arc is greater than that of the matrix. The coating has excellent corrosion resistance and can be used in the ambient temperature corrosion environment. The results of high temperature oxidation test at.600 C show that the oxidation weight increase of the coating is much lower than that of the high strength steel matrix after the high temperature oxidation test 100h. The oxidation rate of the coating is always lower than that of the matrix in the test process. The oxidation resistance of the coating is completely anti oxidation, and it has excellent high temperature oxidation resistance.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG174.4;TQ630.1

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