1,3,4-THIADIAZOLES AS POTENTIAL EP ADDITIVES - A TRIBOLOGICAL EVALUATION USING A 4-BALL TEST

This paper reports a comparative study of the wear-reducing efficiency and extreme pressure properties of 0.5% (w/v) admixtures of paraffin oil and 2-amino-5-arylamino-1,3,4-thiadiazole additives and a commerci al sulphur-phosphorus additive in a four-ball test. 2-Amino-5-p-Cl-phe nylamino-1,3,4-thiadiazole additive shows excellent EP properties as i s evident from the surface smoothness of SEM micrographs. The triboche mistry of the wear-scar surface has been investigated by the auger ele ctron spectroscopy (AES) technique.