j heidarian - polymer science and technology division
a babnalbandi - polymer science and technology division
h.h khanli - polymer science and technology division

2 layer polyethylene coatings consist of maleinated polyethylene primer and HDPE topecoat have been used for many years in this research in order to enhance adhesion and durability of the 2 layer coating systems a kind of surface chemical treatment of substrate with organosilane materials has been used . It is expected that by adding the chemical treatment to the application process of 2 layer polyethylene coating 2LPE, an improved products with better or at least equal coating properties than 3LPE coating can be obtained . so, adhension of maleinated PE layer to metal after chemical treatment with organosilans at different conditions was measured. also , cathodic disbonding tests were conducted on samples which their metal substrate were previously treated with organosilanes . finally the results of adhension and cathodic disbonding tests for chemically treated and untreated coated panels samples were compared.

polyethylene coating , chemical surface treatment , acthodic , disbonding, organosilane , steel