Study the Preparation of Polymeric Coatings Supported by Nanomaterials to Inhibit Corrosion in the Oil Tanks

Abstract

In order to determine the most suitable composite coatings to inhibit corrosion in
the oil tanks, the protection method was studied by the method of multiple layers of
protection. Where there were three layers of protection, the base layer is a phosphate
process using zinc phosphate, the second layer is a base painting (Hydrazine Hydrate
with an epoxy zinc coating), while the top layer was a composite coating matrix of
unsaturated polyester and epoxy supported by different fraction weight of
nanomaterials. The top layer was supported by nano kaolin with 1% weight fraction,
nano magnesium oxide with 3% weight fraction and nano zinc oxide with 5% weight
fraction. The three layers were painted on metal pieces (1.5cm*1.5cm) of corroded
tanks used to store diesel fuel. The hardness of the metal parts was studied before and
after the phosphate process, where the results showed that the sample surface hardness
was 123 HB and after the phosphate process was 131 HB.
The chemical corrosion and electrochemical corrosion test were carried out for a
group of samples that were painted only once with a topcoat and again with three layers
of paint. The results showed that the best protection against corrosion is the sample that
painted with three layers of coating, and the top coating supported by a nano
magnesium oxide, it has lowest corrosion current value (162.59 nA/cm2). Furthermore,
the adhesion test showed that the coating supported by nanomaterials have higher

adhesion strength than those that are not supported by nanomaterials. Where the highest
adhesion strength was (776 Psi) for magnesium oxide nanoparticle coating.