牺牲阳极在FPSO阴极保护中的应用

Application of Sacrificial Anode in FPSO

浮式生产储油船FPSO目前应用十分广泛,其舱室内多采用阴极保护与涂料的联合保护进行腐蚀控制。通过参考标准和实际模拟实验,对FPSO储油仓特殊工况下腐蚀行为进行了模拟实验研究,并通过系列实验研究了牺牲阳极在模拟工况环境中的实际性能。结果表明高温条件会显著增加船舱钢板的腐蚀,钢板所需要的牺牲阳极用量成倍增加,由25℃升至70℃,电流密度需求值随着温度升高,需求值增长3倍。青岛双瑞自主产品SR高温锌阳极在FPSO油舱模拟高温高盐工况环境中,仍可保持较好电位、电容量、溶解形貌,具有良好的应用价值。

At present,FPSO is widely used,in which cathodic protection and coating are used for corrosion control.Referring to the standard and the actual simulation experiment,the corrosivity of the sacrificial anode in the special working conditions of the oil storage tank is studied by simulation experiment,and the actual performance of the sacrificial anode in the simulated working conditions is studied through a series of experiments.The results show that the high temperature condition can significantly increase the corrosion of cabin steel plate,and the amount of sacrificial anode required for steel plate increases exponentially from 25℃to 70℃.The demand value of current density increases three times with the increase of temperature.The SR high temperature zinc anode produced by Qingdao SunRui can still maintain good potential,capacitance and dissolution morphology in the simulated high temperature and high salt environment of FPSO oil tank.Qingdao SunRui SR high temperature zinc anode has good application value.