Influence of Hydroxyl Groups on the Inhibitive Corrosion of Gemini Surfactant for Carbon Steel

Chengxian Yin; Minjian Kong; Juantao Zhang; Yuan Wang; Qingwei Ma; Qibin Chen; Honglai Liu

doi:10.1021/acsomega.9b02989

Influence of Hydroxyl Groups on the Inhibitive Corrosion of Gemini Surfactant for Carbon Steel

ACS Omega. 2020 Feb 4;5(6):2620-2629. doi: 10.1021/acsomega.9b02989. eCollection 2020 Feb 18.

Authors

Chengxian Yin¹, Minjian Kong², Juantao Zhang¹, Yuan Wang¹, Qingwei Ma¹, Qibin Chen², Honglai Liu²

Affiliations

¹ State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Institute of China National Petroleum Corporation, Xi'an 710077, China.
² State Key Laboratory of Chemical Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China.

Abstract

The corrosion inhibition performance of propanediyl-1,3-bis(N,N-dimethyl-N-dodecylammonium bromide) and propanediyl-1,3-bis(N,N-dihydroxyethyl-N-dodecylammonium bromide), abbreviated as PDDB and PDHDB, respectively, for carbon steel in 1.0 mol·L^-1 hydrochloric acid solution was investigated using the gravimetric method and various electrochemical techniques, together with scanning electron microscopy and energy-dispersive spectrometry. Results show that PDHDB always has a better inhibition performance relative to PDDB, which can be attributed to the introduction of hydroxyl groups at the hydrophilic headgroups, thereby causing an extra interaction between inhibitors and the metal surface and favoring its adsorption. These findings highlight that the modification to the headgroups of Gemini-type inhibitors may be another effective approach to improving their inhibition performance.