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Abstract

The extender properties of fly ash, a waste byproduct of thermal power stations, were assessed and compared with those of conventional extenders. The development of protective and decorative industrial coatings as solvent borne, cold curing, two pack epoxy systems, using fly ash as an extender, is reported. The effects of fly ash on coating properties and film characteristics are also discussed. A two body (high stress) abrasion test was conducted to assess the abrasion resistance of the coatings. It is concluded that the properties of fly ash that contribute to its usefulness as an extender are its abrasion resistance, chemical inertness, low oil absorption, and low specific gravity. The coatings that were developed have shown improved corrosion and abrasion resistance and also better resistance to chemicals (5%Na₂ CO₃, 1%NaOH, and 2%H₂ SO₄) and organic solvents (toluene and mineral spirit). Fly ash can be a cost effective substitute for conventional extenders in high performance industrial coatings.

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Use of fly ash in high performance industrial coatings

Abstract

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