粗糙度对彩色涂层与基体间附着力的影响

Influence of surface roughness on the adhesive force between colored coating and substrate

研究粗糙度对基体和涂层之间的附着力的影响,其一,是因为基体表面的凸凹不平导致漆膜在其上附着时产生互相咬合的现象,增大了附着力;另外,基体表面粗糙度越大其真实表面积越大,在基体表面发生腐蚀时腐蚀产物不易扩散,因此涂层附着力不易下降。

The influence mechanism of the roughness on adhesion between substrate and coating was studied.Firstly,painted film will occlusally contact the rough and uneven surface of the substrate,resulting in the increased adhesion;secondly,the real surface area will increase while the roughness increases,and the corroded product cannot diffuse easily when the corrosion occurs,and therefore the adhesion will not decrease easily.