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Abstract A mixed liquid of diethylene glycol and water can be satisfactorily used in hydraulic system for all weather conditions. The galvanic corrosion of multiple contacting metals is tested for practical hydraulic system by contact corrosion test, high temperature refluxing contact corrosion test as well as by the determination of corrosion potentials of steel and Al-bronze couple. The composition of inhibitors for use in anti-corrosion hydraulic system is selected. This inhibited liquid gives good corrosion protection to steel, copper, brass, Al-bronze, zinc, aluminium, black enamelled steel as well as steel plated with chromium and can be safely used in pure hydraulic system. It has passed service tests of 23 months duration in practical hydraulic system with satisfactory corrosion protection to all above mentioned metals.
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Received: 25 June 1982
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