EFFECTS OF ZINC POWDER ADDITION TO VILLA GLOSS AND SILKA LUX MARINE ENAMEL PAINTS ON CORROSION RESISTANCE OF MILD STEEL

WA Ayoola; MA Bodude; H Onovo; A Oyetunji

doi:10.4314/njt.371.1590

EFFECTS OF ZINC POWDER ADDITION TO VILLA GLOSS AND SILKA LUX MARINE ENAMEL PAINTS ON CORROSION RESISTANCE OF MILD STEEL

Authors

WA Ayoola DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING, UNIVERSITY OF LAGOS, LAGOS STATE. NIGERIA
MA Bodude DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING, UNIVERSITY OF LAGOS, LAGOS STATE. NIGERIA
H Onovo DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING, UNIVERSITY OF LAGOS, LAGOS STATE. NIGERIA
A Oyetunji DEPT. OF METALLURGICAL AND MATERIALS ENG’G, FED. UNIV. OF TECHNOLOGY AKURE, ONDO STATE. NIGERIA

DOI:

https://doi.org/10.4314/njt.371.1590

Keywords:

zinc powder, inhibition efficiency, potentiodynamic, weight loss, corrosion rate, pit corrosion

Abstract

The anti-corrosion properties of paints can be optimised when adequate proportion of the paint constituents are used. Effect of zinc powder addition to Villa Gloss and Silka Lux Marine Enamel paints on corrosion resistance of mild steel was studied. Quantitative Analysis and Potentiodynamic Polarisation Technique were used to evaluate the samples. The results indicate that zinc powder addition between 15 and 25 % significantly reduced the corrosion rate. The corrosion rate stabilized at approximately 0.10 mmpy when zinc powder added was above 15 %, independent of the exposure time. Potentiodynamic anodic polarization curves of the samples immersed in seawater showed that sample with 25% zinc powder addition exhibited highest corrosion potential and the least corrosion current density. Microstructural analysis of the samples also revealed the presence of pitting corrosion at the surfaces of the samples and their geometry, volume fraction and distribution vary with the zinc powder addition.

http://dx.doi.org/10.4314/njt.v37i1.21

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Published

2017-12-31

Issue

Vol. 37 No. 1 (2018)

Section

Chemical, Industrial, Materials, Mechanical, Metallurgical, Petroleum & Production Engineering

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How to Cite

EFFECTS OF ZINC POWDER ADDITION TO VILLA GLOSS AND SILKA LUX MARINE ENAMEL PAINTS ON CORROSION RESISTANCE OF MILD STEEL. (2017). Nigerian Journal of Technology, 37(1), 158-166. https://doi.org/10.4314/njt.371.1590