How to test the adhesion strength of plating of the silver layer

Silver plating process, the broad range of applications. Not long ago, someone actually put his car coated with a layer of silver, the effect is extraordinary. Silver experts often encounter some problems. For example, the surface of the silver layer plating adhesion strength of the how judgment below to see Shanghai silver plating plant experts is how to test.
Silver plating adhesion test:
1 bend test will be bent or folded sheet plating, coating shall not come off. Linear plating along the winding mandrel test, observe whether there is loss from the skin.
2 crossed cut test with 30 ° sharp hard steel knife coating surface zoned zoned 2mm apart parallel lines cut through metal coating reaches the base metal. Crossed between the base metal coating shall not escape, or cross-zoned into lmm small box, not from the skin, shedding.
3 trial rasp rasp edges from the base about a 45 ° angle, file moving coating surface, the coating should not lift or fall off.
4 Thermal shock test The large specimens in a furnace heated to 300 ℃, heat lh, and then quenched in water, the coating may not blistering, peeling separation.
If silver device can withstand the test of the above three methods, indicating that the device is electroplated silver layer adhesion is quite reliable. Of course, there are other testing methods, Molybdenum tube above four.To fill the hole shall be filled with a high temperature before baking to remove fumes, so you can remove the oil remaining in the hole to help the sealant to enter and combine divisible dip resin closed after oil, vacuum filling effect than simply soaking better. General product used zinc stearate soaked in 150-180 degrees, sealing effect is also good, but the plating process should avoid using strong acid to prevent the closure material dissolved.
Porous parts after plating dip in overlapping good performance replacement-type anti-rust oil is also good. Because such ability to penetrate the oil, corrosion and water displacement effects are strong, help cleaning is not thorough enough to prevent excessive corrosion damage