Systems for treating a metal substrate

A system for deoxidizing and coating a substrate, comprising:

• a deoxidizing composition comprising a Group IVA metal in an amount of 10 ppm to 1,000 ppm, a Group IVB metal in an amount of 200 ppm to 5,000 ppm, and free fluoride in an amount of 2 ppm to 100 ppm, the deoxidizing composition having a pH of 1.0 to 3.0 and being substantially free of chromium, wherein the amounts are based on total weight of the deoxidizing composition;
• and
• an adhesive coating composition comprising:
• an epoxy-containing component in an amount of 45 percent by weight to 85 percent by weight;
• a guanidine curing agent in an amount of 0.5 percent by weight to 20 percent by weight;
• and elastomeric particles in an amount of 11 percent by weight to 40 percent by weight;
• wherein percent by weight is based on total weight of the adhesive coating composition.