油品储罐H_2S对铁锈腐蚀产物自燃性研究

为了分析有氧条件下H2S对铁锈腐蚀产物的自燃性,模拟含硫油品储罐中铁锈(Fe2O3:75%;Fe(OH)3:7%;Fe3O4:18%)在有氧条件下与H2S气体的反应试验。将铁锈与H2S气体、O2按不同比例混合形成的混合物进行反应,再进行所得产物的氧化反应。采用X射线衍射分析法鉴定混合气体与铁锈的反应产物,并研究不同初始O2体积分数下的混合气体与铁锈的反应及其产物的再氧化反应,通过温度变化评价铁锈与H2S气体反应产物的自燃性。结果表明,在有氧条件下,H2S对铁锈腐蚀产物主要是FeS;随着初始O2体积分数的增加,铁锈与H2S的反应伴随其产物的氧化反应,HS对铁锈腐蚀产物的量减小,这种产物再氧化自燃性降低。

Pyrophoric Tendency of Rust Corrosion Product Eroded by Hydrogen Sulfide in Oil Tanks

In order to analyze the pyrophoric tendency of rust corrosion product eroded by hydrogen sulfide under aerobic condition,the reaction between rust(Fe2O3:75%,Fe(OH)3:7%,Fe3O4:18%) and H2S in sulfur containing oil tanks under aerobic condition was studied experimentally.H2S and O2 were mixed in different proportions to form a mixture.Rust reacted with the mixture.The products of reaction between rust and the mixture were identified by X-ray diffraction.The reaction between rust and H2S and the oxidation reaction of its products were examined under different initial O2 volume fractions.The pyrophoric tendency of corrosion product was evaluated by the temperature changes.The results show that the main corrosion product eroded by hydrogen sulfide under aerobic condition is FeS,and that with the increase in initial O2 volume fraction,the reaction between rust and H2S is accompanied with the oxidation reaction of its product,the amount of the product in the oxidation process decreases and the reoxidation pyrophoric reactivity of the product decreases.