Proper bonding between the substrate and coating needs proper surface preparation. If the bonding does not occur or is weak due to insufficient surface preparation, an array of failures or defects may result, including cratering, blistering, crawling, improper wetting, detaching, orange peeling, and uneven gloss.
FREMONT, CA: Upon investing significant capital into facilities and equipment, many business owners entrust themselves with preserving their investments. Applying the precise protective coating can have a substantial effect on the durability of the equipment and facilities. However, selecting the right coating needs critical analysis of the hazards and challenges presented by the substrate’s end-use setting and ensuring the coating’s formulation is configured to address the problem areas.
Coatings are encompassed of a compound mixture of raw materials. They are applied to various substrates that are dried and cured to offer protection from destructive elements—heat, moisture, wind, humidity, cold, oxidization, ultra-violet, and other ecological factors, which breakdown substrate integrity over time.
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Causes of Coating Failures
There are four common causes of coating failures:
Inadequate Surface Preparation
Proper bonding between the substrate and coating needs proper surface preparation. If the bonding does not occur or is weak due to insufficient surface preparation, an array of failures or defects may result, including cratering, blistering, crawling, improper wetting, detaching, orange peeling, and uneven gloss.
Improper Application Environment
An extensive range of environmental factors can also cause coating failures during application. Variances in cleanliness, air purity, temperature, humidity often decrease the efficiency of the bond or cause irregular spreading. Proof of application environment issues surfaces in the form of wetting problems, blistering, solvent popping, and cratering.
Poor Application Technique
Application is another factor taken into consideration during product formulation. The use of most liquid formulas contains spraying, dipping, brushing, or rolling, but each of these methods also needs specific equipment and techniques. The failure to apply coatings employing their designed techniques ensues in sagging, orange peeling, or running.
Improper Formulation
A coating’s formulation ought to be customized to the manufacturing process and the item’s end-use environment. If not formulated correctly, coatings are bound to fail even when suitable surface preparation, application environment, and techniques are present. Common characteristics of formulation failures comprise chalking, alligatoring, erosion, checking, cracking, and mud-cracking.
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