CD Skripsi
Pengaruh Variasi Penambahan Zinc Dithiophospate Terhadap Tingkat Oksidasi Dan Sifat Tribologi Pada Rbd Palm Olein Sebagai Bio-Based Lubricant
ABSTRACT
Tribology is a science that focuses in friction, wear, and lubrication between two asperities undergoing relative motion. Any friction occurred between base body and contacy body may resulting some wear particles that detached from the two asperities. To minimize the wear phenomenon, lubricants must be added between the base body and the contact body. Lubrication in one method that is proven to be effective to minimize friction and wear in a tribosystem. Base stock of a lubricant consists of three broad categories, that is mineral oil, vegetable oil, and synthetic oil. Usage of mineral oil and synthetic oil as the base stock of lubricants may cause bad effects to the environment because of their toxicity and their non-degradable nature. To reduce the usage of mineral oil and synthetic oil as the base stock of lubricant, vegetable oil can be used. One example of vegetable oil that can be used as the base stock of lubricants is palm oil. The palm oil fraction that will be used in this study is RBD Palm Olein. Advantages of using palm oil as the base stock of lubricants are their low prices, easy to find, degradable, environmentally friendly, and renewable. Despite this, palm oil had bad stability against oxidation. This could lead to bad lubrication properties. In this study, ZDDP will be added to the lubricant as an additive. ZDDP is proven to be a very good additive to a lubricant, as it could resist wear very well. The mixture between RBDPO and ZDDP will be tested using the disc-on-disc tribometer apparatus. The resuts obtained from this study are the 98% RBDPO – 2% ZDDP variation yields the lowest wear rate, at 8,0329 x 10-6 mm3/Nm. Meanwhile, the 99% RBDPO – 1% ZDDP variation yields the highest wear rate, that has the value of 1,31617 x 10-5 mm3/Nm.
Keywords: Wear rate, lubricant, disc-on-disc tribometer, RBDPO, ZDDP
Tidak tersedia versi lain