The friction of various rubber articles lubricated with acid and alkaline water
1995
Richards, S.C. | Roberts, A.D. (Malaysian Rubber Producers' Research Association Brickendonbury, Hertford (United Kingdom))
Friction coefficients have been measured for commmonly encountered uses of rubber, involving practical formulations and real surfaces. The aim was to see whether the water lubricated friction was sensitive to the acidity or alkalinity of the water. Measurements were made on fully compounded black- and silica-filled test sheets rubbed against glass, concrete and tarmac. Measurements were also made for windscreen wipers, running shoes and bicycle tyres. Results show that the friction in the presence of alkaline water (pH 11) is noticeably lower than for slightly acid water (pH 6). Observations indicate that it is possible to detect an influence of water pH on friction in practical situations as well as under laboratory conditions.
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