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Feasibility and corrosion inhibition efficacy of zeolite-supported lauric acid imidazoline as corrosion inhibitor in cementitious mortar
Highlights A novel corrosion inhibitor Ca2+-ZSLAI was synthesized. Ca2+-zeolite loading LAI with 1% by mass of cement presented best corrosion resistance efficacy. Addition of Ca2+-ZSLAI increased compressive strength and lowered porosity of mortar. Using of Ca2+-zeolite as additive improved the corrosion resistance of the embedded steel.
Abstract A zeolite supported organic corrosion inhibitor with high loading efficiency was obtained by loading a synthesized lauric acid imidazoline (LAI) in the Ca2+-exchanged zeolite (Ca2+-zeolite) framework. The influences of the as-prepared Ca2+-zeolite supported LAI (Ca2+-ZSLAI) as an admixture in porosity and compressive strength of the resulting cement mortar were examined. The protective effect of Ca2+-ZSLAI against steel corrosion of steel-mortar immersed in NaCl solution was discussed upon. The properties of the steel reinforced mortar incorporating Ca2+-ZSLAI was compared with the reference mortar specimen without corrosion inhibitor and the specimen solely with LAI or Ca2+-zeolite. The steel corrosion resistance performance of Ca2+-ZSLAI was revealed by electrochemical testing on steel reinforced mortar during the chloride ions accelerated corrosion test. Experimental results revealed that mortar with 6% of cement replaced by Ca2+-zeolite saturatedly supported LAI as corrosion inhibition additive presented 14% higher compressive strength and 23% lower total porosity compared to the reference mortar. Besides, such dose of inhibitor could retain 92% corrosion inhibition efficiency of the embedded steel after 142 immersion days. The excellent corrosion resistance efficacy of Ca2+-ZSLAI was ascribed to the chloride “binding capacity” of the densified mortar substrate improved by the filling and pozzolanic effect of Ca2+-zeolite and the chloride “barrier capacity” of the protective interfacial film deposited by the LAI released from the Ca2+-zeolite carrier.
Feasibility and corrosion inhibition efficacy of zeolite-supported lauric acid imidazoline as corrosion inhibitor in cementitious mortar
Highlights A novel corrosion inhibitor Ca2+-ZSLAI was synthesized. Ca2+-zeolite loading LAI with 1% by mass of cement presented best corrosion resistance efficacy. Addition of Ca2+-ZSLAI increased compressive strength and lowered porosity of mortar. Using of Ca2+-zeolite as additive improved the corrosion resistance of the embedded steel.
Abstract A zeolite supported organic corrosion inhibitor with high loading efficiency was obtained by loading a synthesized lauric acid imidazoline (LAI) in the Ca2+-exchanged zeolite (Ca2+-zeolite) framework. The influences of the as-prepared Ca2+-zeolite supported LAI (Ca2+-ZSLAI) as an admixture in porosity and compressive strength of the resulting cement mortar were examined. The protective effect of Ca2+-ZSLAI against steel corrosion of steel-mortar immersed in NaCl solution was discussed upon. The properties of the steel reinforced mortar incorporating Ca2+-ZSLAI was compared with the reference mortar specimen without corrosion inhibitor and the specimen solely with LAI or Ca2+-zeolite. The steel corrosion resistance performance of Ca2+-ZSLAI was revealed by electrochemical testing on steel reinforced mortar during the chloride ions accelerated corrosion test. Experimental results revealed that mortar with 6% of cement replaced by Ca2+-zeolite saturatedly supported LAI as corrosion inhibition additive presented 14% higher compressive strength and 23% lower total porosity compared to the reference mortar. Besides, such dose of inhibitor could retain 92% corrosion inhibition efficiency of the embedded steel after 142 immersion days. The excellent corrosion resistance efficacy of Ca2+-ZSLAI was ascribed to the chloride “binding capacity” of the densified mortar substrate improved by the filling and pozzolanic effect of Ca2+-zeolite and the chloride “barrier capacity” of the protective interfacial film deposited by the LAI released from the Ca2+-zeolite carrier.
Feasibility and corrosion inhibition efficacy of zeolite-supported lauric acid imidazoline as corrosion inhibitor in cementitious mortar
Xu, Weiting (author) / Wei, Jiangxiong (author) / Yang, Zhenguo (author) / Xu, Peng (author) / Yu, Qijun (author)
2020-03-22
Article (Journal)
Electronic Resource
English
LAI , Lauric acid imidazoline , Ca<sup>2+</sup>-zeolite , Ca<sup>2+</sup>-exchanged zeolite , ZSLAI , Natural zeolite supported lauric acid imidazoline , Ca<sup>2+</sup>-ZSLAI , Ca<sup>2+</sup>-zeolite supported lauric acid imidazoline , OCP , Open circuit potential , EIS , Electrochemical impedance spectroscopy , DPP , Dynamic potential polarization , SEM , Scanning electron microscopy , XRD , X-ray diffraction , FTIR , Fourier transform infrared spectroscopy , R , Reference mortar , L1 , Mortar with 0.5% of cement replaced by LAI by mass , L2 , Mortar with 1% of cement replaced by LAI by mass , Z1 , Mortar with 3% of cement replaced by Ca<sup>2+</sup>-zeolite by mass , Z2 , Mortar with 6% of cement replaced by Ca<sup>2+</sup>-zeolite by mass , ZL1 , Mortar with 3% of cement replaced by Ca<sup>2+</sup>-zeolite saturatedly supported LAI , ZL2 , Mortar with 6% of cement replaced by Ca<sup>2+</sup>-zeolite saturatedly supported LAI , Steel , Organic corrosion inhibitor , Loading , Zeolite , Steel reinforced mortar , Electrochemical property
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