Fig. 1. Schematic of Dolly test for pull-off adhesion strength measurement: 1, 2, and 5 are belong to adhesive failure, however, 2 and 4 are belong to cohesive failure.
Fig. 2. Photos of dollys made from different metals such as Al, Cu, Fe, STS and Zn.
Fig. 3. Surface of adherend and dolly after Dolly test for different dolly metals.
Fig. 4. Adhesive strength of Araldite standard adhesive on different dolly metals.
Fig. 5. Results of pull-off adhesion test: (a) adhesive strength of paint coating on adherend for different surface roughness, (b) and (c) are photos of surface after Dolly test.
Fig. 6. Photos of contaminated surface by tap water: (a) and (b) are the specimen before and after spray water cleaning, respectively.
Fig. 7. Comparison of contaminated area measured by OM image and ImageJ program for the specimens contaminated by tap water.
Fig. 8. Adhesive strength of paint coating on adherend for contaminated adherend surface: (a) and (b) are the specimen before and after spray water cleaning, respectively.
Fig. 9. SEM image and EDS peaks for contaminated adherend surface: (a) and (b) are contaminated by tap water, (c) and (d) are contaminated by salt water.
Table 1. Specification and properties of metals for dolly
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