Effects of heat-stable salts on the corrosion behaviours of 20 steel in the MDEA/H2S/CO2 environment

被引：20

作者：

Dong, Baojun ^{[1
,2
]}

Zeng, Dezhi ^{[1
]}

Yu, Zhiming ^{[1
]}

Tan, Sizhou ^{[3
]}

Jiang, Jingjing ^{[3
]}

Zhang, Qiang ^{[3
]}

Cai, Shaozhong ^{[3
]}

Yuan, Xi ^{[3
]}

机构：

[1] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Sichuan, Peoples R China

[2] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Corros & Protect Ctr, Beijing, Peoples R China

[3] PetroChina Southwest Oil & Gas Field Co, Res Inst Nat Gas Technol, Chengdu, Sichuan, Peoples R China

来源：

CORROSION ENGINEERING SCIENCE AND TECHNOLOGY | 2019年 / 54卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Heat-stable salt; corrosion; inorganic salt; organic salt; MDEA; 20; steel; SUPERCRITICAL CO2; STAINLESS-STEEL; PIPELINE STEEL; CARBON-STEEL; H2S; METHYLDIETHANOLAMINE; PRESSURE; TEMPERATURE; ABSORPTION; CAPTURE;

D O I：

10.1080/1478422X.2019.1591737

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of HSS (heat-stable salts) on the corrosion behaviours of 20 steel were explored using self-designed HTHP autoclave. The charateristics of corrosion scales were investigated by SEM, EDS and XRD. Corrosion scales of 20 steel formed in the liquid phase environment were mainly composed of FeS2, Fe3O4, and Fe. HSSs affected the corrosion rate through changing the morphology of corrosion scales of 20 steel. Inorganic salts enhanced the attractive force between ions and the hydrolysis of CH3COO- in organic salts promoted the ionisation of HS-, which accelerated the deposition of FeS on the surface of 20 steel to form a dense corrosion scales, thereby significantly reducing the corrosion rate of 20 steel. Inorganic-organic salts reduced the bonding opportunity between Fe2+ and S2- and allowed the formation of porous corrosion scales on the surface of 20 steel, thus increasing the corrosion rate of 20 steel. [GRAPHICS] .

引用

页码：339 / 352

页数：14

共 30 条

[1] RETRACTED: Investigation of mixed amine solution in gas sweetening plant (Retracted Article) [J].