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Inhibition Performance of Amphoteric Fluorinated Surfactant and its Mixed Systems on Carbon Steel in Hydrochloric Acid
Author(s) -
Liu Jinyan,
Wang Zeshi,
Yang Wenyu,
Zhou Xing
Publication year - 2016
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-016-1863-2
Subject(s) - chemistry , pulmonary surfactant , hydrochloric acid , chemisorption , electrochemistry , bromide , scanning electron microscope , carbon steel , corrosion , inorganic chemistry , carbon fibers , lone pair , nuclear chemistry , organic chemistry , composite number , molecule , electrode , adsorption , biochemistry , physics , materials science , quantum mechanics , composite material
C 8 F 17 SO 2 NH(CH 2 ) 3 N(CH 3 ) 2 (CH 2 COO)Na (PNHD) is a novel amphoteric fluorinated surfactant. The corrosion inhibition of PNHD and its mixed systems with cetyl trimethylammonium bromide (CTAB) or octylphenol ethoxylate 9.5 EO (TX‐10) for carbon steel Q235 in 1.0 M HCl solution was studied in this paper. The corrosion inhibition efficiency ( η ) was determined by weight loss, electrochemical methods and scanning electron microscope. The values of η from the three methods were almost identical. The hydrophilic head group of PNHD has two lone pairs of electrons at the nitrogen atoms, suggesting a chemisorption mechanism between carbon steel and surfactant. The PNHD and mixed systems inhibitors acted as a mixed inhibitor; there is interaction between PNHD and CTAB or TX‐100. A compact protective film was formed in PNHD and its mixed systems.