摘要
采用电化学方法研究了X70钢在富含硫酸盐还原菌(SRB)的喷气燃料中的腐蚀行为。结果表明,SRB加速了X70钢的腐蚀,使得阳极过程受阻,促进了阴极去极化作用;SRB的浓度影响了X70钢的电化学阻抗特性;在相同温度下,随SRB浓度的增加,腐蚀电流密度增大,电荷转移电阻和生物膜电阻减小,说明X70钢的腐蚀加剧,反应由阴极过程控制;在相同浓度下,温度升高腐蚀电位负移,说明X70钢的耐蚀性随之下降。
The corrosion behaviors of X70 steel in jet fuel with sulfate reduced bacteria （SRB） were studied by electrochemical impedance spectroscopy and polarization curves. The results show that SRB can accelerate the corrosion of X70 steel. The anodie process of X70 steel was blocked and cathodic depolarization was promoted. The concentration of SRB can influence the AC impedance characteristics of X70 steel. At the same temperature, with the increase of the SRB concentration, the corrosion current density increased, the charge transfer resistance and the biofilm resistance decreased, indicating that the X70 steel corrosion will be more serious with bigger SRB concentration. Corrosion reaction was controlled by the cathodic process. In the same concentration, with the temperature increasing, the corrosion potential shifted negatively, and the higher the temperature, the greater the degree of negative shift, resulting in the decrease of X70 steel corrosion resistance.
出处
《腐蚀与防护》
CAS
北大核心
2013年第9期803-807,共5页
Corrosion & Protection
基金
中央高校基本科研业务费资助(3122013SY34)
中央高校基本科研业务中国民航大学专项(ZXH2011C001)
关键词
喷气燃料
SRB
X70钢
微生物腐蚀
极化曲线
电化学阻抗谱
jet fuel
sulfate reduced bacteria
X70 steel
microorganism corrosion
polarization curve
electrochemical impedance spectroscopy
