Test Background
The oil resistance test of insulating paint films can measure the oil resistance of insulating paint films. That is, the sample is immersed in transformer oil maintained at a certain temperature, and after a certain period of time, the surface changes of the paint film are observed.
Zhongke Testing Reliability Experiment Center has the capability of reliability testing of various paint films and provides professional oil resistance testing services for insulating paint films.
Scope of tests
1) According to use: there are wood paint, iron paint, glass paint, aluminum paint;
2) Divided by state: water-based paint and oil-based paint. Water-based paint is mainly latex paint, while lacquer paint, polyurethane paint, etc.;
3) According to the form of action: volatile paint and non-volatile paint;
4) According to the surface effect: transparent paint, translucent paint and opaque paint.
Test method
Take three samples, half of which are immersed in the transformer oil and half of which are exposed to the air. Then put them in the oven and raise the temperature to (105±2)°C (or other temperatures specified in the product standards) for 25 to 30 minutes. Keep for 24 hours. Take the samples out of the oil and gently wipe the oil with clean gauze.
If two of the samples meet the following requirements, the oil resistance is qualified:
1) The surface of the paint film immersed in oil and the upper surface of the paint film that is not immersed in oil should be flat and smooth, without blistering, wrinkling or falling off.
2) The paint film should not be wiped off with gauze.
Test standard:
HG/T 3857-2006 Determination of oil resistance of insulating paint films
