The Effectiveness of Fish Scale Waste-Synthesized Chitosan and Food-Grade Chitosan as Corrosion Inhibitor

Abstract

Organic chitosan synthesized from fish scales and food-grade chitosan were investigated, via the potentiodynamic polarization method, as potential corrosion inhibitors on ASTM A36 iron in 3.5% NaCl solution. The results of the study revealed that chitosan, both food-grade and that synthesized from fish scales, inhibited the corrosion of ASTM A36 iron in 3.5% NaCl solution. The source of the chitosan did not have any effects on the chitosan’s behavior or potential. The inhibitor efficiency value increased as the chitosan concentration increased. The optimum concentration of the two types of chitosan was 3000 ppm; the inhibitor efficiency value decreased when the inhibitor concentration was increased to4000 ppm. This inhibitor efficiency value change occurred because at 4000 ppm, the inhibitor concentration exceeded the best conditions to form a protective layer on the surface of ASTM A36 iron. Chitosan is cathodic, regardless of the source, and both types of chitosan were similar in terms of polarization type, adsorption, and isothermal adsorption. The isothermal adsorption interaction of chitosan (from either source) followed Temkin-type kinetics with the ASTM A36 iron and had chemisorption characteristics.

A Review of Various Sources of Chitin and Chitosan in Nature

“…Other experiments investigating the green microalgae and yeast cell walls [180,177], marine diatoms, coralline algae, and mollusks by chemical processes using strong acids and bases [7,24,25,111,133], also yielded positive results of chitin and chitosan. These sources of chitin and chitosan outperformed crustacean chitin and chitosan.…”

“…Due to the extreme seasonal and restricted supply of crustacean shells, the expensive demand, and ambiguous physico-chemical characteristics such as protein contamination, inconsistent levels of deacetylation, and high molecular weight, the conventional method of chitin and chitosan production has restricted potential for industrial adoption [133]. Fungal chitosan has been the subject of recent studies [134].…”

Durio Zibethinus Extract Performance as Corrosion Inhibitor in Simulated Seawater

“…In general, the amount of the adsorption free energy up to -20 kJ/mol means the presence of intermolecular and metal interactions (which indicates physisorption). The value presents the spontaneous reaction of the DZP extract inhibitor and the surface of ASTM A36 carbon steel in the corrosive solution [31]. The value of R 2 of 0.82 indicates a high agreement with Frumkin Equation.…”

Characterization Chitosan Nanoparticles Prepared from the Stalks of Agaricus bisporus Brown and its Effect on Inhibition of Aspergillus flavus and Reducing Aflatoxin B1 Production

“…The demand for chitin and chitosan produced from Mushrooms resources has increased recently according to its distinctive physiochemical characteristics preferred to those produced by traditional crustacean resources and because of the seasonal and limited availability of the crustacean resources so fungal chitosan has become a topic of discussion for many modern studies [1], Many studies which were conducted in Iraq succeeded in extracting bioactive compounds from Mushrooms resources especially the edible Mushrooms such as Agaricus bisporus and Pleurotus ostreatus and using healthily or nutritionally [2][3][4][5][6]. Chitosan nanoparticles were tested for more than two decades, and ionic gelation is considered as one of the preferred preparation methods which was described for the first time by [7] and this method depends on the existence of reverse charged groups, for example amino and proton chitosan groups IOP Publishing doi:10.1088/1755-1315/1262/6/062015 2 and negative polyanion groups Tripolyphosphate Sodium ) TTP) [8].…”