Copper & Yellow Metal Protection

QWERL 90 is a synthetic, water soluble formulation specifically designed as a scuff and tarnish preventive for copper and copper alloys in continuous annealing and pickling lines. QWERL 90 is recommended for use at concentrations of 0.5% to 5.0% in water, keeping in mind the severity of the operation dictates final concentration. The temperature of the solution should be maintained between 170° F and 190° F to affect efficient deposition of film. Application of QWERL 90 should be followed by a hot air blow-off or dryer.