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为探讨E玻璃纤维在油气田环境中的耐腐蚀性能,利用高温高压釜设备,考察了纤维在包含CO2、H2S气体和Cl-溶液的模拟油气田环境中的腐蚀行为。采用SEM、IR、XPS和EDS分析了E玻璃纤维腐蚀前后的形貌、表面结构和元素含量,结合重量和拉伸强度变化,揭示了E玻璃纤维在模拟油气田环境中的腐蚀机理。结果表明:E玻璃纤维在油气田模拟酸性环境腐蚀后拉伸强度降低,其腐蚀机理为离子交换机理,该机理不仅受酸浓度影响,还与复杂离子和不溶性盐的生成有关;E玻璃纤维表面阳离子的浸析打乱了玻璃网络的连续性,破坏了纤维的玻璃结构,导致纤维强度降低。
In order to investigate the corrosion resistance of E-glass fiber in the environment of oil and gas field, the corrosion behavior of fiber in simulated oil-gas field environment containing CO2, H2S gas and Cl-solution was investigated by using autoclave. SEM, IR, XPS and EDS analysis of the E glass fiber before and after corrosion morphology, surface structure and element content, combined with changes in weight and tensile strength, revealing the E glass fiber corrosion in simulated oil and gas field environment mechanism. The results show that the tensile strength of E glass fiber decreases after acid corrosion in oil and gas fields. The corrosion mechanism of E glass fiber is ion exchange mechanism, which is not only affected by acid concentration, but also related to the formation of complex ions and insoluble salts. E glass fiber surface cations The leaching disrupts the continuity of the glass network, destroying the glass structure of the fiber, resulting in a decrease in fiber strength.