Exploration of natural polymers for use as green corrosion inhibitors for AZ31 magnesium alloy in saline environment.

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ID: 74226
2020
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Abstract
Seven natural polymers namely, chitosan (CHI), dextran (Dex), carboxymethyl cellulose (CMC), sodium alginate (ALG), pectin (PEC), hydroxylethyl cellulose (HEC), and Gum Arabic (GA) were screened for anticorrosion property towards AZ31 Mg alloy in 3.5 wt.% NaCl solution. CHI, Dex, CMC, PEC, and GA accelerated the corrosion while ALG and HEC moderately inhibited the corrosion of the alloy. HEC and ALG (1 g/L) protected the alloy by 64.13 % and 58.27 %, respectively. Two inhibitor cocktails consisting of either HEC or ALG, KI, and Date palm seed oil have been formulated. HEC- and ALG-formulations inhibited the alloy corrosion by 80.56 % and 77.43 %, respectively from EIS technique. Surface observation studies using SECM, AFM, SEM, and EDX agreed with other experimental results revealing effective corrosion inhibition by the formulations. X-ray photoelectron spectroscopy, FTIR, and UV-vis results disclose that Mg(OH) co-existed with adsorbed inhibitor complexes.
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umoren2020explorationcarbohydrate Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Umoren, Saviour A;Solomon, Moses M;Madhankumar, A;Obot, Ime B;
Journal Carbohydrate polymers
Year 2020
DOI
S0144-8617(19)31134-8
URL
Keywords
corrosion magnesium alloy natural polymer corrosion inhibition corrosion inhibitor formulation saline medium

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