Salt spray test evaluation method of the following:
1, a test piece parameters:
For the corrosion rate proof equipment, use 4 specimens of the following materials as a test reference element: CR4 level selection based on ISO3574 steel surface without perforations, scratches, after texturing solution (mean roughness Ra = 0.8 surface axis after um ± 0.3um), high purity zinc, the quality of the residue percentage of less than 0.1%, the reference heart application member cleaning a test before the experiment, the experimental results will remove all hazardous residue (dust, oil or other residues), dry impatient accurate measurement of a test piece quality parameters, to ± 1mg, the back surface of the reference test using a test piece can be disengaged moisture resistance coating material (such as tape) various maintenance, if necessary, the experimental spacing at 5mm-10mm beam ends also conducts maintenance to cover the edge of the specimen.
2, the reference portion of a test piece:
The reference member 4 is placed in the salt spray test of the four corners of the test box, did not increase maintenance face down, with a vertical orientation to 20 ℃ ± 5 ℃, if no salt spray chamber filled with the specimen, a part of the proposed set of idle as thermoplastic release specifications tablet PC simulation test piece, in order to ensure the symmetry of the sprayer, the specimen simulation material should be plastic, glass or other thermoplastic interlayer insulating layer material, is not easily detected hazards like corrosion rate, a test reference element should be made of material plasticity support frame, such as plastic or similar material coated with a surface layer, the following reference portion and a test similar to the top member to be corrosion-resistant dust collector.
3, experimental time
A way for the time of the experiment should be 48H (6 th Xunhuanjitong), method B should be 96H (2 Xunhuanjitong th)
4, measuring quality impairment
After the completion of the experiment should first remove the salt spray test in a test piece parameters, eliminate maintenance of the specimen with the coating, followed by standard constantly cleaned to remove erodible.
5, test equipment operation status
Each piece is a test of the quality parameters if the damage within the required range, the feel good laboratory equipment operation.