Volume 15, Issue 4 (2-2026)
مهندسی خوردگی 2026, 15(4): 76-76 |
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Characterization and evaluation of corrosion resistance of ceramic coatings containing corrosion inhibitors in AZ31 Alloys. مهندسی خوردگی 2026; 15 (4) :76-76
URL: http://journal.ica.ir/article-1-268-en.html
URL: http://journal.ica.ir/article-1-268-en.html
Abstract: (4 Views)
In the present study, electrolytic plasma oxidation (PEO) method was utilized to produce an oxide coating on AZ31 magnesium alloy. Electrolytes used during PEO process were Na2SiO3 and Na3(PO4). In order to impregnate inhibitors to the external porosity of the PEO layer, the samples were immersed in an ultrasonic device containing L-Hisidine (l-His) and sodium acetate (NaAc) inhibitors for 5 minutes. To prevent the impregnated inhibitors from leaking out an epoxy polymer coating was applied over the samples. Finally, the corrosion polarization tests and electrochemical impedance spectroscopy (EIS) together with SEM and EDS analyses were used to evaluate the evidence and effectiveness of the utilized inhibitors. According to EIS results, the amount of corrosion resistance in the scratched samples after 48 hours in NaAc inhibitor was 4.7 × 106 Ω.cm2 and its rate of inhibition efficiency was 96% as compared to that of l-His inhibitor, which had an efficiency of 77%. The results of EDS elemental analysis also confirmed that less corrosion products were produced around the scratched sample.
Type of Study: Research |
Subject:
General
Received: 2026/09/30 | Accepted: 2026/02/3 | Published: 2026/02/3
Received: 2026/09/30 | Accepted: 2026/02/3 | Published: 2026/02/3
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