Aging performance of steel-plastic-transition coating
This article focused on evaluation of the aging rate of the steel-plastic-transition coating during the use.The methods employed for this evaluation include outdoor exposure and indoor ultraviolet accelerated aging tests on the fusion-bonded epoxy(FBE)coating and three-layers polyethylene coating(3PE)of the steel-plastic-transition.The tests were carried out in terms of encompass color difference,microscopic morphology,the adhesion strength for the FBE coating,and the tensile strength,elongation at break,and microscopic morphology for the 3PE substrate.The results indicated that the indoor ultraviolet aging was more effective than outdoor exposure aging for the FBE coating.The acceleration factor based on color difference testing was approximately 8.6～12.8 times,while the acceleration factor based on the holes and cracks formation tests for the coating was between 10.3 and 12.8 times.Regarding the 3PE substrate,the ac-celeration factor based on elongation at break was about 8.6 times,and the correlation between the acceleration factor and tensile strength was not significant.
万方数据
维普
