分别用刷涂和喷涂的方法制备了一系列锌含量不同的无机富锌防腐涂层试样,考察其在油田水系统、pH值为4的酸性油田水系统以及海水环境下的防腐性能.结果表明,无机富锌涂层的耐酸性较差,无机树脂与锌粉质量比为1∶2.6的喷涂试样的耐腐蚀性能最好.通过对试样的宏观腐蚀形貌及腐蚀产物XRD谱图进行分析,得到腐蚀产物的物相及结构,主要腐蚀产物为Zn5(OH)8Cl2·H2O,在高氯浓度下,不溶物Zn5(OH)8Cl2·H2O对锌的腐蚀起到阻碍作用,同时锌粉的溶解牺牲对钢铁起到阴极保护作用.%A series of inorganic zinc-rich coating samples with various zinc contents was prepared by brush and spray methods to investigate the corrosion resistant performance of zinc-rich coating in oilfield produced water system,sour oilfield produced water system (pH value of 4) and marine atmosphere. Results showed that the acid resistant property of zinc-rich coating was not good enough, coating having a mass ratio of inorganic resin/ zinc powder equaled 1 ∶ 2. 6, exhibited the best corrosion resistant property. By analyzing the morphology of sample prior and post to corrosion,comparing the XRD pattern of corrosion product,the phase and structure of the corrosion product was determined. It was found that Zn5 (OH)8Cl2 · H2O was the main corrosion product, under high chlorine conditions, insoluble Zn5(OH)8Cl2 · H2O could inhibit further corrbsion, soluble zinc acted as sacrificial anode for the cathodic protection of steel.
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