Anti-corrosion coating is a special coating that can protect the metal surface from corrosion. It can form a protective film on the metal surface and effectively prevent the metal surface from being damaged by oxidation, acidification and other factors. Anti-corrosion coatings are usually composed of raw materials such as basic coatings, pigments, fillers, additives and solvents, and have the characteristics of corrosion resistance, wear resistance, high temperature resistance, and waterproof. Anti-corrosion coatings are widely used in metal surface coating in construction, ships, bridges, oil and gas, chemical industry, machinery and other fields, which can effectively prolong the service life of metal materials, reduce maintenance costs and reduce environmental pollution.
Detection performance, instrument list
| Performance name | Equipment used | Detection steps |
|---|---|---|
| corrosion rate | Electrochemical Corrosion Rate Tester | 1. Scratch a straight line on the surface of the coating sample; 2. Place the coating sample in the electrochemical corrosion rate Tester; 3. Measure the potential value and current value of the scratched part, and calculate the corrosion rate |
| Salt spray corrosion performance | Salt spray corrosion Test Chamber | 1. Place the coating sample in the salt spray corrosion Test Chamber; 2. Observe the corrosion degree of the coating sample within a certain period of time |
| Heat resistance | Thermal cycle Test Chamber | 1. Place the coating sample in the thermal cycle Test Chamber; 2. Observe the performance change of the coating sample under high temperature and low temperature environment |
| Weather resistance | weather aging box | 1. Place the coating sample in a weather aging box to simulate natural climate conditions; 2. Observe the changes of the coating sample within a certain period of time |
| Adhesion | Peel Strength Tester | 1. Paste the coating sample on the material to be tested; 2. Use a peel strength Tester to conduct a peel test to test the adhesion of the coating |
| density | Density meter | 1. Place the paint sample in a density meter; 2. Measure the density of the paint sample |
| pH value | pH meter | 1. Place the paint sample in the pH meter; 2. Measure the pH of the paint sample |
| film thickness | Coating Thickness Gauge | 1. Measure the film thickness of the coating with a Film Thickness Gauge |
| chromatic aberration | Colorimeter | 1. Put the paint sample in the color difference meter; 2. Measure the color difference between the paint sample and the standard color plate |
For each test, the specific steps will be different, and you need to refer to the corresponding test standards or methods. Commonly used standards or methods include: ASTM, ISO, GB/T, etc. During the detection process, attention should be paid to the accuracy and repeatability of the instrument, as well as the preparation and processing of the sample. When testing special properties such as salt spray corrosion performance, heat resistance, and weather resistance, it is necessary to pay attention to the control of the testing environment and the selection of testing time to ensure the accuracy and reliability of the test results. When testing the corrosion rate, it is necessary to scratch the surface of the coating sample to simulate the local damage in actual use, so as to better evaluate the corrosion protection performance of the coating. During the testing process, it is also necessary to pay attention to the source and quality of the samples and paint samples used to ensure the representativeness and reliability of the test results.
