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Corrosion protective coatings deteriorate for a number of reasons including insufficient surface preparation and deficient thickness. This paper discusses the mechanisms of failure and provides a technical overview regarding the deterioration aspects of coatings.
Abstract:Corrosion protective coatings deteriorate for a number of reasons including insufficient surface preparation and deficient thickness. These two are the most common causes of coating failures.While the vast majority of all coatings perform admirably premature failure can and does occur to even properly specified applied and cured coatings under atmospheric influences. Those include the effects of heat and light; moisture solvent chemical and gas permeation; stress both internal and external; and biological influences. Furthermore the substrate over which the coating is applied (steel aluminum concrete wood and others) also plays an important role in the mechanism and extent of deterioration. The effects of cathodic protection may induce or aggravate coating failure.This paper discusses the mechanisms of failure and provides a technical overview regarding the deterioration aspects of coatings.
Keywords: downloadable, coatings, surface preparation, deficient thickness, mechanisms
This paper discusses a classic example where the facts surrounding the failure of a lining system were ignored and undue reliance was placed on laboratory analysis. This “blind faith” in analytical data without a sound causal theory caused the failure analysts to disregard or overlook the obvious.
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In this paper the approach of an Oil Company is demonstrated from the initial choice between different primers: inorganic zinc and organic (epoxy) zinc., to all the preliminary pre-qualification tests, the subsequently field test performed, and the procedures adopted, costs included.