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Lubricants 2017, 5(1), 8; doi:10.3390/lubricants5010008

Influence of Organo-Sulfur Compounds with Overbased Calcium Compounds on Lubrication in Cold Forming

1
Lubricants Research Laboratory, JX Nippon Oil & Energy Corporation, 8 Chidori-cho Naka-ku, Yokohama-shi, Kanagawa 231-0815, Japan
2
Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Maria Dolores Bermudez
Received: 29 December 2016 / Revised: 27 January 2017 / Accepted: 7 March 2017 / Published: 16 March 2017
(This article belongs to the Special Issue Tribology in Manufacturing Process)

Abstract

The authors analyzed the structures of sulfurized olefins using NMR spectroscopy and studied the effects of sulfur chain length and alkyl structure on the ironing performance. They found that branched chain olefins, which contain branched alkyl groups, show superior ironing performance to straight chain olefins, provided that their carbon numbers are relatively low. When the sulfurized olefins were used in combination with overbased detergents (calcium sulfonate or salicylate), they showed a higher performance in ironing than with sulfurized olefins alone. It was also found that lubricating films consisting of both iron sulfide and calcium carbonate seem to improve ironing performance. View Full-Text
Keywords: organo-sulfur compound; sulfurized olefin; cold forming; ironing; overbased detergent; calcium sulfonate; calcium salicylate organo-sulfur compound; sulfurized olefin; cold forming; ironing; overbased detergent; calcium sulfonate; calcium salicylate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Takaki, T.; Yagishita, K.; Tsujimoto, T.; Wakabayashi, T. Influence of Organo-Sulfur Compounds with Overbased Calcium Compounds on Lubrication in Cold Forming. Lubricants 2017, 5, 8.

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