Patent ID: 8021890

Claim:
A method for identifying a location of active corrosion in a metal brake component of a brake system through assessing a concentration of iron in brake fluid, comprising the steps of: (a) providing a colorimetric reagent and a brake fluid sample located nearest to a first brake component at a first location in the brake system; (b) contacting said colorimetric reagent with said brake fluid sample, wherein said colorimetric reagent reacts to produce a color indicating the presence of iron in said brake fluid sample, and (c) observing and comparing said color with a standard indicating an iron concentration of about 100 parts per million or greater, wherein if said color matches said standard indicating an iron level of about 100 parts per million or greater, additional testing is performed on a brake fluid sample located nearest to a second brake component at another second location in the brake system in an attempt to identify a location of active corrosion.