哪里有能做冷热冲击试验，和盐雾试验

测试方法：

[]Thermal cycling. Test parameters:[/]

3.1 Place sample in a chamber capable of reaching temperatures of -20F to 225F.
3.2 Cycle chamber from -20F to 225F dwelling at the minimum or maximum temperature for 1 hour. Adjusting the temperature from min to max should be done as quickly as possible.
3.3. Perform this test from min to max and max to min a total of 50 times
3.4. Analyze results for paint cracking, chipping, or flaking
3.5. After the thermal cycling, perform the adhesion test on the samples.

[]Salt spray samples for 200 hours in accordance with ASTM B-117-90.[/]

4.1 Create one long scratch in the painted plastic surface prior to test for each sample such that creepage can be observed.
4.2. After the 200 hour salt spray test and 72 hour recovery, there must be no more than 1/8" creepage from the scribed line.
4.3 After the 200 hour salt spray test and 72 hour recovery, use the same tape as used in the adhesion testing and firmly apply a piece over the scribed line. Remove the tape with a sharp jerk and evaluate how much paint is removed or delaminated. Removal of more than 1/8" from the scribed line results in a failure.