Assessment of Automotive Coatings Used on Different Metallic Substrates

Table 4

Results of the impact resistance test of different primers and primer/topcoat systems.

	PP	SP	AP	DP
Aluminum panel	D	D	D	D
Steel panel	ND	ND	ND	ND
Hot-dip galvanized steel	ND	ND	ND	ND
Electrogalvanized steel	ND	ND	ND	ND
Primer/topcoat system
Aluminum	D	D	D	D
Steel	ND	ND	ND	ND
Hot-dip galvanized steel	ND	ND	ND	ND
Electrogalvanized steel	ND	ND	ND	ND

ND: not delaminated; D: delaminated.