& INSPECTIONS QUALITY ASSURANCE
After the manufacturing of high-quality coating systems, the final variable in the product’s usefulness is the application. Careful and proper application is key to the success of any coating.
There are three vital elements to effective coating protections, the material, surface preparation and the application. The purpose of coating application is to develop a highly adherent continuous protective layer of material over the substrate in a relatively constant and even thickness.
DGC AFRICA utilises the best possible method of application to achieve not only the best finish, but also the most accurate and consistent film formation based on the selected material and accessibility. The company also monitors environmental conditions before and during all applications to ensure that no external climatic conditions can influence the curing or performance of the coating system being applied.
For a specification to serve a useful purpose, it needs to be complied with; a good specification that is adhered to will produce optimum coating life and is economically advantageous.
DGC AFRICA will not compromise on quality. A Qualified inspector will conduct regular inspections to ensure that the conditions and limitations of the specification are adhered to without compromise. The company undertakes critical inspections before, during and after surface preparation and coating applications in accordance with various international standards as outlined below:
DESCRIPTION OF INSPECTION
Measuring ambient temperature, Relative Humidity, surface temp and Dew point
Measuring the profile size on steel after abrasive grit blasting
Testing the amount of dust & debris on the surface
Testing of soluble salt deposits on the substrate
Measuring the WFT (Wet Film Thickness) of a coating
Measuring the DFT (Dry Film Thickness) / coating thicknesses of cured products on ferrous and non-ferrous substrates
Determining the pH of concrete, especially when the substrate was exposed to acidic environments
Measuring the moisture content of concrete
Measuring the coating adhesion by means of destructive testing. This test is normally conducted as a PQT
(Pre-qualification test), however can be required more often
ASTM D7091 or SSPC PA2