Effect of surface treatments on interfacial strength and durability of metal-polymer composite bond
Date
2016
Authors
Sumaiya, Syeda Noor E
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Abstract
Effect of surface treatments on Strength and durability of aluminum 6061-Henkel Hysol EA 9891RP (room temperature curing epoxy) bond was studied using single lap shear, flatwise tensile and wedge crack test. The interfacial strength (IFSS) and % cohesive fracture varied with composite adhesive thickness and 0.03-0.04 mm that maximized the interfacial fracture was chosen to compare surface treatments. The effect of treatments on IFSS and tensile strength increased in the following order: PAA+BR127 (RT) < UT+BR127 (120oC) < Alodine < Alodine+EC3901(RT) < Alodine+BR127 (RT) < PAA < UT < UT+BR127 (RT) < Alodine+EC3901 (90oC) < PAA+EC3901(RT) < PAA+EC3901(90oC) < PAA+BR127 (120oC) < UT+EC3901(90oC) < UT+EC3901(RT) < Alodine+BR127 (120oC). The environmental durability decreased in the following order Alodine+EC3901 (90oC) < Alodine+BR127 (120oC) < PAA+BR127 (120oC) < PAA+EC3901 (90oC) < UT < UT+EC3901 (90oC) < UT+EC3901 (RT) < PAA+EC3901 (RT). PAA and Alodine, combined with BR127 (120 oC) and EC3901 (90oC) are the optimal surface treatments
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Keywords
Surface treatments, Interfacial strength,