不同腐蚀体系中低合金钢锈层的拉曼光谱研究

利用激光拉曼光谱法研究了舰船用镍铬系低合金钢在天然海水以及分别添加双氧水、高氯酸钾和过硫酸钠的NaCl（3.5％）溶液等4种体系中浸泡后腐蚀锈层的物相组成。结果表明：在含双氧水体系和天然海水体系中,钢样的内外锈层物相主要是α-Fe2O3、γ-FeOOH和Fe3O4。高氯酸钾和过硫酸钠腐蚀体系,其腐蚀锈层的外锈层除了含有α-Fe2O3和γ-FeOOH外还出现了γ-Fe2O3,内锈层只含有α-Fe2O3和γ-FeOOH,未发现Fe3O4。说明镍铬系低合金钢在含双氧水体系和天然海水体系中的腐蚀锈层物相组成差异最小。

Study on Corrosion Rust Layers of Low Alloy Steel in Different Simulated Seawater Environment Using Raman Spectroscopy

Laser Raman spectroscopy （LRS） was used to investigate the main component phase of corrosion rusty layers of low alloy steel in different simulated seawater environment. The result showed that the main component phases of both the top and bottom rusty layers are α-Fe2O3 , γ-FeOOH and Fe3O4 in the simulated seawater environment with H2O2, which is found the same with that of the seawater environment However, the main component of the top and bottom rusty layer of low alloy steel in simulated seawater environment containing KClO4 were found respectively to be α-Fe2O3, γ-FeOOH , γ-Fe2O3 and α- Fe2O3 , γ-FeOOH. And the main component of that containing Na2S2O8 were found respectively α-Fe2O3 , γ- Fe2O3 and α- Fe2O3 , γ-FeOOH , α-FeOOH. Obviously the composition of the rusty layers in the simulated seawater environment containing neither KClO4 nor Na2S2O8 is the same with that in seawater.