Back
Knowledge

Surface cleanliness and surface cleanliness test methods

Abstract: 本文介绍了表面清洁度及其在涂装过程中的重要性，并详细描述了多种用于测量表面清洁度的方法。表面清洁度是确保多涂层系统涂装质量的关键因素，因为它直接关系到基体或带涂层表面是否被污染物污染，从而影响下一层涂装的效果和最终涂层性能。文章提到的测试方法包括灰尘测试套件、氯离子专用测试套件、可溶性盐分测试套件等，这些方法能够检测出表面中可能存在的污染物如氯化物、硫酸盐、硝酸盐等，并通过测量pH值、铁含量、氯离子和可溶性盐分等级来评估表面清洁度。

surface cleanliness

In addition to being brushed or abraded during the initial surface preparation stage, the coated surface may also be sprayed, high-pressure water sprayed or simply rinsed. Many times, wear media or water is recycled. At this point it is important to carefully monitor the contamination levels of the recycled material to avoid re-contamination of the surfaces being cleaned.


Surface contamination from salts such as chlorides, sulfates, nitrates, etc. can cause peeling, blistering and premature coating anomalies. Therefore, in multi-coat systems it is necessary to measure the cleanliness of the surface prior to application to ensure that the substrate or coated surface is free of contamination before the next coat is applied.


There are a variety of field testing methods to ensure surface cleanliness:


  • Dust Test Kit

  • Chloride Ion Specific Test Kit, Tests Abrasives and Water

  • Chloride-specific test kit to test surface cleanliness

  • Soluble Salt Test Kit - Using the Bresle Patch Method

  • Soluble Salt Test - Using a Salt Contamination Meter

  • Surface Contamination Test Kit

*Measurement of chloride, sulfate and nitrate levels

*Test pH, iron, chloride and soluble salt levels


Visual inspection of the surface is also required, and there are various graphical standards to assist operators and inspectors.


Relevant knowledge