摘要
采用动电位极化曲线法,测量了静水压力1~6 MPa时X100管线钢在3.5%Na Cl海水模拟溶液中的腐蚀电流密度,并外推计算出管线钢在静水压力为7、8 MPa下的腐蚀电流密度。采用ANSYS有限元软件,对含外腐蚀缺陷的X100管线钢,在静水压力分别为5~8 MPa、腐蚀缺陷尺寸56 mm×42 mm×3.6 mm时的等效应力进行模拟,并计算出其相应静水压力下的腐蚀电流密度。依据腐蚀剩余寿命计算公式、Barlow公式和ASME-B31G准则,计算出管线钢在海水模拟环境下应力集中点的腐蚀剩余寿命。
The corrosion current density of X100 pipeline steel under hydrostatic pressure of 1-6 MPa in 3.5% NaC1 solution were measured by dynamic potention polarization curve method. The density of corrosion current at hydrostatic pressures of 7 MPa and 8 MPa were calculated by using extrapolation. The equivalent stress of X100 pipeline steel with external corrosion defects size as 56 min×42 min×3.6 mm was simulated at 5-8 MPa hydrostatic pressures by ANSYS finite element software.The corresponding corrosion current densities were calculated at different hydrostatic pressures. The corrosion residual life of the pipeline at stress concentration point in sea-water simulation environment was computed according to the formula of remaining life of corrosion, barlow formula and ASME-B31G criterion.
出处
《热加工工艺》
CSCD
北大核心
2016年第18期42-45,共4页
Hot Working Technology
基金
国家自然科学基金项目(51201009)
辽宁省自然科学基金项目(2013020078)
关键词
X100管线钢
外腐蚀缺陷管道
极化曲线
有限元
剩余寿命
X100 pipeline steel
external corrosion defects pipeline
polarization curve
finite element
residual life