BIO-LUBRICANTS DEVELOPMENT: REDUCING WEAR SCAR DIAMETERS USING ASHLESS ADDITIVES

An environmentally friendly lube oil was prepared from glycerol and oleic acid. The lube oil viscosity has met the specifications of SAE 50/SAE 90W/ISO VG-150; however, the wear preventive characteristic needed to be improved. Lube oil formulations using various ashless antiwear agents were carried out. The additives used were benzotriazol, elemental sulphur, dibutyl phosphite, 2,5-dimercapto-1,3,4-thiadiazol and combinations thereof. The performance of the formulas was represented by wear scar diameters (WSDs), which were measured by the four ball wear tester (ASTM D-4172). Experimental results showed that all formulations successfully improved the wear properties. The WSDs were reduced from 0.84 mm to 0.34 – 0.75 mm, which were comparable to those of commercial lube oils. The results also indicated that a) dibutyl phosphite was so far the best additive, b) no sinergystic effects were shown from the use of additive mixtures, c) formulation with dibutyl phosphite – benzotriazol mixture resulted in lube oil with a low WSD and less corrosiveness.

Dibuat oleh : Dicky Dermawan, Dyah Setyo Pertiwi, Ahmad Siddik, Sayd Rachmadiyan Pahlevi

Alamat e-mail : dickydermawan@gmail.com
Kata kunci :  bio-lubricants, ashless antiwear agent, wear scar diameter
Keterangan : Karya ilmiah ini dimuat  pada ARTICLES BALI INTERNATIONAL SEMINAR ON SCIENCE AND TECHNOLOGY 2011 “ Strengthening Basic Sciences and Technology for Industrial Sustainability“ July 22-23 , 2011, BALI-INDONESIA

BIO-LUBRICANTS DEVELOPMENT: REDUCING WEAR SCAR DIAMETERS USING ASHLESS ADDITIVES