In modern painting, coating quality, coating construction, and coating management are the three elements to obtain high-quality coatings. The three complement each other and are indispensable. And coating quality and coating performance testing is an important part of coating management. Using professional testing methods to achieve scientific coating management is what painting workers need to be familiar with and master.
Coating quality control and management can be divided into the quality control of coating products and the quality control and management of coating construction. Only if both can meet the requirements can the expected coating purpose be achieved. Excellent coatings are the premise of obtaining high-quality coatings, but during the production, storage and transportation of coatings, their performance may change due to various reasons. Therefore, testing whether the coating product is within the scope of technical indicators specified in the product standard is the work that the coating worker needs to do. Testing the performance of the coating can determine whether the coating construction has achieved the painting purpose, and also help to find the specific links that exist in the coating construction. For example, when the adhesion of the coating performance is found to be poor, in addition to excluding the adhesion factor of the coating product itself, if there is a phenomenon of falling off between the coating and the substrate. It can be considered that it is improper pretreatment or improper selection of coatings (such as a certain coating is not suitable for a certain metal surface); if there is a phenomenon of falling off between coatings, it may be caused by poor matching of the selected coatings, or improper construction (such as the coating interval is too long, the coating surface is not cleaned, etc.). There are many methods of performance testing, and there can be many different testing methods for the same testing item. This article introduces the commonly used coating quality and coating performance testing standards and methods at home and abroad.
The standard is the product of a specific historical period. With the progress of the times, the standard is constantly improved, perfected and improved accordingly. Therefore, except for special circumstances, new standards should be adopted as much as possible in the testing work.
