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首页> 外文期刊>International Journal of Electrochemical Science >Effect of CO2 and H2S on the Corrosion Resistance of FV520B Steel in Salinity Water
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Effect of CO2 and H2S on the Corrosion Resistance of FV520B Steel in Salinity Water

机译：CO 2 和H 2 S对盐度水中FV520B钢耐蚀性的影响

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The corrosion behavior of FV520B stainless steel in different salinity water was studied byelectrochemical measurements such as potentiodynamic polarization, electrochemical impedancespectroscopy (EIS), cyclic voltammetry (CV) and X?ray photoelectron spectroscopy (XPS). The resultsshowed that the open circuit potential (OCP) shifts negatively and the thermodynamic stability ofFV520B steel decreases when CO 2 and H 2 S were introduced into the salinity water (SW). Thepolarization curves of FV520B steel show typical passive characteristics in the salinity solutions. WhenCO 2 and H 2 S are introduced into the SW, the corrosion current density of FV520B steel increases, thepolarization resistance decreases, and the corrosion resistance decreases, and the corrosion resistance isthe poorest in H 2 S salinity water. XPS analysis shows that the passive film of FV520B steel are mainlyconsist of oxides and hydroxides of Fe, Cr, Mo, Ni and Cu. With the introducing of CO 2 and H 2 S, thecontent of Fe 2+ and Cr 3+ in passive film decreases, the content of Fe 3+ and Cr 6+ increases, and thecorrosion resistance of passive film decreases. The corrosion resistance of FV520B steel in SW issignificantly reduced by corrosive gas CO 2 and H 2 S, and the corrosion resistance in H 2 S shows the worst.
机译：通过电势极化，电化学阻抗谱（EIS），循环伏安法（CV）和X射线光电子能谱（XPS）等电化学测量研究了FV520B不锈钢在不同盐度水中的腐蚀行为。结果表明，将CO 2和H 2 S引入盐度水（SW）时，FV520B钢的开路电势（OCP）负向偏移，热力学稳定性降低。 FV520B钢的极化曲线在盐度溶液中显示出典型的被动特性。在SW中引入CO 2和H 2 S时，FV520B钢的腐蚀电流密度增加，耐极化性降低，耐蚀性降低，在H 2 S盐度水中腐蚀性能最差。 XPS分析表明，FV520B钢的钝化膜主要由Fe，Cr，Mo，Ni和Cu的氧化物和氢氧化物组成。随着CO 2和H 2 S的引入，钝化膜中Fe 2+和Cr 3+的含量降低，Fe 3+和Cr 6+含量增加，钝化膜的耐蚀性降低。 FV520B钢在SW中的腐蚀性被腐蚀性气体CO 2和H 2 S大大降低，在H 2 S中的腐蚀性最差。

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