THE COMPOSITION OF LUBRICANT-DERIVED SURFACE-LAYERS FORMED IN A LUBRICATED CAM/TAPPET CONTACT .2. EFFECTS OF ADDING OVERBASED DETERGENT AND DISPERSANT TO A SIMPLE ZDTP SOLUTION

被引：87

作者：

WILLERMET, PA ^{[1
]}

DAILEY, DP ^{[1
]}

CARTER, RO ^{[1
]}

SCHMITZ, PJ ^{[1
]}

ZHU, W ^{[1
]}

BELL, JC ^{[1
]}

PARK, D ^{[1
]}

机构：

[1] SHELL RES LTD,THORNTON RES CTR,CHESTER CH1 3SH,CHESHIRE,ENGLAND

来源：

TRIBOLOGY INTERNATIONAL | 1995年 / 28卷 / 03期

关键词：

SURFACE FILMS; CAM/TAPPET FRICTION; ZDTP;

D O I：

10.1016/0301-679X(95)98964-F

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The surface films formed by a set of oils of related additive chemistry, but with differing detergent and dispersant contents, have been chemically characterized using a combination of surface analysis techniques. The films were formed in a cam/tappet friction apparatus with a direct acting bucket tappet geometry. In the absence of overbased detergent, the amorphous films were composed essentially of inorganic zinc phosphates formed by the ZDTP anti-wear additive, and evidence of higher molecular weight phosphates (e.g. metaphosphates) was found. Adding overbased detergent and dispersant resulted in partial replacement of zinc by the detergent metal and loss of the higher molecular weight phosphates in favour of ortho- and pyro-phosphates.

引用

页码：163 / 175

页数：13