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The Basics of Applying an Industrial Coating

Surface preparation is very critical prior to the application of coating because it ensures better adhesion; however, it is not to enough to guarantee the quality of surface finish because a lot depends on the skills of industrial coating applicator. The ultimate performance of the industrial coating is impacted with how the surface has been prepared but most coating failures are due to failure in following the coating manufacturer’s suggestions.

Factors that affect coating application

Surface preparation

A skilled industrial coating applicator understands the importance of surface preparation. Different substrates require different methods of surface preparation. Some surfaces require nothing more than just wiping dirt and dust away while others require blast cleaning to remove traces of oxide and rust. If industrial coating will be applied to a metal substrate that has been previously cleaned through abrasive grits, the measurement of dry film thickness will be more complicated than a smooth surface that only required a simple cleaning method.

Film thickness

Adequate film thickness is important in having a successful coating application because it allows you to estimate the amount of material needed to ensure full coverage. On the other hand, under application of coating can result in premature failure. A skilled industrial coating applicator understands the actual amount of film thickness based on the metal surface that will be coated.

Methods of coating application

There are different methods in applying coating but it is largely dependent on the kind of coating that will be used. The most widely used method is through paint brush or paint roller because they are more affordable and easily accessible.

  • Paintbrush – not just any type of brush will do in coating application. Quality natural fiber paintbrushes are used for industrial application in areas where there is a need for decorative paint and for surface tolerant primers where good penetration on rusty steel substrates is required. Industrial coating applicator requires a great deal of care when using a paintbrush to ensure excellent finish.
  • Air spray – the conventional air spray device is quite simple and inexpensive but it is important to consider the correct combination of air volume, air pressure and fluid flow to ensure surface finish that is free from defects. Pressurized air sprays used by industrial coating applicator includes pressure feed tanks to deliver paint at a regulated pressure
  • Airless spray – requires hydraulic pressure that is generated through air pressure pump with a high ratio of fluid pressure to air input pressure. Atomization is achieved through hydraulic pressure that forces paint through its specialized nozzles. Airless sprays will ensure high build coatings without thinning. Very rapid application is possible which is more effective. Compared to conventional coating, the use of airless spray eliminates over spray and bounce back for a reduction in wastage and losses of materials.

Different conditions also need to be taken into account like the condition of the substrate, surface temperature and the atmospheric conditions during the application of coating. No matter how skilled the industrial coating applicator, if the weather is bad, it can compromise the result. 

This is such valuable information, very much so for factory owners.
Posted by: Ed | July 15, 2016, 4:30 pm
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