摘要
为减缓LNG(液化天然气)储罐外罐混凝土腐蚀速度,降低LNG储罐的蒸发率,提升LNG储罐的美观度,对LNG储罐外罐涂漆的选材及施工技术进行了研究,对LNG储罐混凝土腐蚀机理进行了分析,总结了储罐涂漆的材料选取标准。通过对现行LNG储罐常用涂漆材料(丙烯酸、双组分聚脲弹性体和液体橡胶)进行性能比对发现:双组分聚脲弹性体具有施工方便、抗撕裂强度高、与混凝土附着率高、对海洋性气候适应性好、耐老化性能强以及颜色可调等优点,是LNG储罐涂漆的首选材料。通过对现有LNG储罐涂漆实施方案的研究,得出1套较为优化的涂漆施工方案,并指出在施工过程中应重点关注基层表面处理质量、封闭底漆涂刷质量,以及聚脲喷涂工序的时间间隔、喷涂设备的选型及工艺参数等因素。
In order to slow down the concrete corrosion speed of LNG outer storage tank,reduce the evaporation rate of LNG storage tank,and improve the aesthetic degree of LNG storage tank,the material selection and construction technology of LNG outer storage tank are studied,the concrete corrosion mechanism of LNG storage tank is analyzed,and the material selection standards of storage tank paint material is summarized.Through the performance comparison of the common paint materials of LNG storage tank(acyclic acid,bi-component polyurea elastomer and liquid rubber),it is found that the bi-component polyurea elastomer has advantages such as easy construction,high tearing strength,high concrete adhesive rate,good adaptation for marine environment,strong ageing resistant and adjustable colors,and it is the preferred material choice for LNG storage tank paint.Through the study on the existing scheme for LNG storage tank painting,a set of optimal painting construction scheme is got,and it points out that during the construction process,factors such as the treatment quality of surface,painting quality of sealer,the interval of polyurea painting process,selection of painting equipment and process parameters should be paid close attention to.
作者
付俊涛
FU Juntao(Natural Gas Company,SINOPEC)
出处
《油气田地面工程》
2019年第A01期170-174,共5页
Oil-Gas Field Surface Engineering
关键词
LNG储罐
腐蚀
涂漆
聚脲弹性体
LNG storage tank
corrosion
paint
polyurea elastomer
