Heptanoic acid (cas 111-14-8) adsorption on grafted palygorskite and its application as controlled-release corrosion inhibitor of steel
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Add time:08/27/2019 Source:sciencedirect.com
This study deals with the anchoring of Heptanoic acid (cas 111-14-8) (HC7) as a corrosion inhibitor to palygorskite clay mineral originated from High Atlas of Marrakech (Morocco) beforehand grafted with 3-aminopropyltriethoxysilane (APTES) entities. Physicochemical characterizations (XRD, FTIR, TG-MS, zeta potential measurements) confirmed the success of the APTES-grafting to silanol sites of palygorskite fibers edges and the heptanoate anions bonding to terminal NH3+ sites of grafted-APTES. Then, full-factorial design allowed optimizing the conditions of heptanoate adsorption. Preliminary electrochemical measurements revealed that functionalized grafted palygorskite (C7-APTES–Pal) can progressively release the heptanoate corrosion inhibitor in 0.1 M NaCl solution to inhibit the steel corrosion processes.
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