Abstract
In the present approach, natural limonite iron oxide samples from Baharyia Oasis areas have been collected and ground to the micro-sized scale to be used as pigment for upholding the corrosion resi...
Highlights
Earthy pigments varying from dull yellow to red and brown are commonly called ochre’s in the economic geology, mining industry, and painting
Coating modification by limonite pigment The investigated limonite coating was based on soya bean oil alkyd resin 60% diluted in xylene as a binder or vehicle to hold all constituents of coating
With the incorporation of limonite pigment particles in the coating formulation with different loading levels, no any defects were observed such as rust, regular blistering distributed on the surface of the coated film, or loss of adhesion and reached the maximum protective behavior for limonite coating (LC)-25 coating
Summary
Earthy pigments varying from dull yellow to red and brown are commonly called ochre’s in the economic geology, mining industry, and painting. The global production of iron oxide pigments in 2000 was estimated to be 1,500,000 Mt., and 87% of the total market is attributed to industrial applications (Will, 2004). Limonite is an iron ore consisting of a mixture of hydrated iron (III) oxide-hydroxides in varying composition. Iron oxides pigments have the advantage of low cost, permanency, and non-toxicity. The chemical industry improved on nature by developing a complete range of synthetic iron oxide pigments (IOPs) that surpass the pigments produced from natural iron ores in uniformity, color quality, and chemical purity.
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