![]() This water content finds its way into the brake fluid via microscopic pores in brake hoses, seals, joints and seams. This process is exasperated in more humid conditions and climates. This application can also be performed with Excellence Titrator T7 or T9.Īnd method files (. Glycol based fluids are hygroscopic which means they absorb water/moisture from the environment at normal atmospheric pressures at a rate of 2-3 per year. Therefore, the boiling point and the water content of brake fluids are essential parameters when considering the safety of a vehicle. When this happens, a failure known as “vapor lock” occurs and the force applied to the pedal is not transmitted to the brake cylinders, potentially leading to a failure of the brake system. As the water content of the brake fluid increases, its boiling point decreases. On average, the brake fluid in a vehicle absorbs up to 1.5 % of water each year. Being an incompressible fluid it is used to transfer force into pressure, and to amplify braking force.ĭOT brake fluids are hygroscopic – they tend to absorb water from the environment, and this absorption cannot be prevented. In this application the water content of a DOT brake fluid was measured fully automatically using a volumetric V30S Karl Fischer titrator connected to an InMotion KF oven autosampler.īrake fluid is a hydraulic fluid used in hydraulic brakes of automobiles.
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