effect of water content in crude oil on the tribological behavior of screw pump’s stator rubber

• Published in: Chinese science bulletin Vol. 59; no. 23; pp. 2868 - 2874
• Main Authors: Lv, Xiaoren, Wang, Shijie, Huo, Xuyao
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer-Verlag 01.08.2014; Science China Press
• Subjects: Chemistry/Food Science; Contact angle; Crude oil; Dewatering (separation process); Earth Sciences; Engineering; Humanities and Social Sciences; Life Sciences; Moisture content; multidisciplinary; oils; Physics; Rubber; Science; Science (multidisciplinary); Swelling; Tribology; water content; Wear; wettability; Stator rubber; Tribological behavior; Crude oil; Screw pump; Water content
• ISSN: 1001-6538; 1861-9541
• DOI: 10.1007/s11434-014-0309-3

It is worthy of studying the effect of water content in crude oil on tribological behavior of stator rubber, because the different water content would affect the swelling and wear of rubber. Compatibility of dewatered crude oil and water was observed after mixture of dewatered crude oil and water (called oil-water mixture) was mechanical stirred and statically placed. Static etching experiment of samples in oil-water mixture was performed using hanging patch test. Wetting contact angle of oil-water mixture on rubber surface was measured by contact angle meter. Tribological behavior of samples in mixture was measured using a ring-on-block tester. The result shows that when the water content is less than 15 %, water can blend with dewatered crude oil, and oil-water separation happens when water content was more than 15 %. With the increasing of water content in crude oil, Wettability of mixture and swelling increment of samples decrease. The wear loss of sample increases after treated by swelling experiment, and FKM owns better wear resistance than NBR.