Articles having improved corrosion resistance

A method for making a copper-free mirror, consisting essentially of:

• contacting a reflective silver metal coated substrate at a temperature of 26° C. to 32° C. with a treating composition at a liquid volume of about 100 to 300 ml/m2,
• wherein the treating composition is a one component system comprising a film-forming organic component comprising
• a silicone resin;
• and
• at least one aromatic triazole compound of the following general formulae:
• wherein
• R includes halogen;
• a branched or cyclic alkyl group of the formula CnH(2n+1);
• a linear, branched or cyclic alkanoyl group of the formula CnH2nOH;
• a linear, branched or cyclic carboxyl group of the formula CnH2nCOOH;
• or a linear, branched or cyclic imino group of the formula CnH2nNH;
• or SO2R with R as defined above;
• and wherein n is greater than 1 and less than or equal to 12;
• R′ includes hydrogen;
• a linear, branched or cyclic alkyl group of the formula CnH(2n+1);
• a linear, branched or cyclic alkanoyl group of the formula CnH2nCOOH;
• a linear, branched or cyclic carboxyl group of the formula CnH2nCOOH;
• or a linear, branched or cyclic imino group of the formula CnH2nNH;
• wherein n includes from 1 to 12;
• M+ includes Li+, Na+, K+ or Rb+;
• X− includes F−, Cl−, Br− or I−;
• and
• the number of groups R on the benzol ring can be 1, 2, 3 or 4;
• and
• an aqueous carrier comprising a liquid having water in about 80% by weight and a C1 to C4 alcohol or a C3 to C4 ketone as a cosolvent in no more than about 20% by weight;
• and
• forming a single layer of a continuous hydrophobic film on the substrate with a thickness of less than 1 μm.