الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Three groups of plastic emulsion paints were formulated using three different types of pigments. Titanium dioxide (TiO2) was applied in the first group of paint (T-series) as a neutral pigment. Zinc phosphate (Zn3(PO4)2) and Ferric oxide (Fe2O3) were added in the two other paint groups (Z-series and F-series, respectively) as anticorrosive pigments. Styrene/butyl acrylate latex was prepared by semicontinuous seeded emulsion polymerization which was used as a binder in the paint formulations. Poly (ani-co-o-toluidine) (PAOT) was introduced to the painting series as a corrosion inhibitor in proportions of 1%, 2%, 3%, and 4%.
PAOT and PMAP inhibitors were prepared by different methods to be incorporated in different emulsion paint formulas via oxidative emulsion polymerization and solution technique polymerization with equimolar amounts of aniline and o-toluidine monomers. The binder and the inhibitor were examined for their particle size and chemical structure by DLS and FTIR analysis. The properties of the paint formulations were examined physically, mechanically, and thermally. The protection efficiency of the paint coatings on steel was examined against corrosion using an immersion test and electrochemical measurements. The DLS curves of the binder latex and the inhibitor showed a unimodal distribution of sizes 151 nm and 42 nm, respectively. However, mix of the two emulsions exhibited a bimodal distribution of both sizes.
The potentiodynamic polarization measurements showed a decrease in the corrosion current density of TiO2 coating paint from 26.4×10-7 A/cm2 to 12.3×10-7 A/cm2 in Fe2O3 coating paint. The least corrosion current density was obtained from Zn3(PO4)2 coating paint of 7.50×10-7 A/cm2. PAOT inhibitor enhanced the protection efficiency of the paint coatings with the optimum of 3%. Zn3(PO4)2 coating paint loaded with 3% PAOT inhibitor demonstrated the highest protection efficiency of 99.96%.