文章基本信息

标题：Corrosion failure analysis of A L80 oil tube thread
本地全文：下载
作者：Cai Rui ; Cai Rui ; Xiao Wenwen 等
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：233
期号：4
页码：042034
DOI：10.1088/1755-1315/233/4/042034
出版社：IOP Publishing
摘要：Material properties of L80 oil tube thread were tested by means of chemical composition analysis, hardness testing and metallographic examination. The results showed that the content of chemical compositions and HRC value accorded to API SPEC 5CT requirements. Micro-morphology and corrosion production analysis of inner surface were carried out by SEM, EDS and XRD. The results showed that the corrosion products on thread were dense and mainly consisted of FeCO₃, but there were a large number of microcracks and micropores in it. The main reason of corrosion for thread sample was crevice corrosion which originated from the infiltration of corrosive medium such as high salinity formation water and CO₂ to thread joint.