Influence of the Porosity of a Plasma-Electrolytic Coating on the Corrosion Resistance of D16 Alloy

• Published in: Materials science (New York, N.Y.) Vol. 54; no. 6; pp. 899 - 906
• Main Authors: Student, M. M., Ivasenko, I. B., Posuvailo, V. M., Veselivs’ka, H. H., Pokhmurs’kyi, A. Yu, Sirak, Ya. Ya, Yus’kiv, V. M.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-05-2019; Springer
• Subjects: Acid deposition; Air pollution; Alloys; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coatings; Materials Science; Porosity; Sodium chloride; Solid Mechanics; Specialty metals industry; Steel corrosion; Structural Materials; Water; D16 alloy; plasma-electrolytic oxidized coatings; oxide-ceramic coatings; corrosion resistance; pores
• ISSN: 1068-820X; 1573-885X
• DOI: 10.1007/s11003-019-00278-z

We study the effect of the coating thickness on the corrosion resistance and porosity of oxide-ceramic coatings on D16 alloy. The coatings were synthesized in an alkaline solution for 10, 60, and 120 min at a current density of 10 A/dm
2
. As a result, the coatings with thicknesses of ∼ 8–12, 50–70, and 80–120 μm, respectively, were formed on the surface of the alloy. The corrosion resistance of the coatings was investigated in a medium of weakly acid rain and in a 3% NaCl solution in water. We established the correlation between the porosity and corrosion resistance of the coatings. The oxide-ceramic coatings synthesized on D16 alloy for 60 min have the lowest porosity and the highest corrosion resistance.