The effect of boundary lubricants on the friction of cast iron

The effect of boundary lubricants on the friction of cast iron

Wear - Elsevier Sequoia S.A., Lausanne - Printed in the Netherlands Systematic Abstracts of Current o. TRIBOLDGY AND RELATED TOPICS The Sulphida...

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Wear -

Elsevier Sequoia S.A., Lausanne - Printed in the Netherlands

Systematic Abstracts of Current o. TRIBOLDGY

AND

RELATED

TOPICS

The Sulphidation of Metals and Alloys. K. N. Strafford, Metals Mater. (Met. Rev. No. I38), 3 (IO) (1969) 153-174; ‘7 figs., I table, 107 refs. A review of the present state of the art of the problem of the corrosion behaviour of materials in sulphur-containing environments and fundamental research in the field. It is concluded that it seems clear that the development of sulphidation-resistant materials must, to a large extent, remain somewhat empirical. Detailed understanding of the complex corrosion, involved with the associated feed-back of ideas, will in general lag behind practical alloy development. Oxidation of Metals and Alloys in GasesLiterature Review. G. C. Wood, Byit. Corvosion J., 4 (5) (1969) 244-248; 144 refs. The review of the preceding five years covers the reactions between metals, alloys or coatings and gaseous environments particularly at elevated temperatures. More emphasis is placed on alloy and coating oxidation and on emerging fields of study, than on pure metals because they are more important practically and greater advances have been made. Oxidation of pure metals is well covered in monographs cited. Microbiological Corrosion of Tanks in Long-term Storage of Gas Oil. G. A. H. Roberts, Brit. Corrosion J., 4 (6) (1~69) 318-321; 2 figs., 2 tables, 2 refS. Investigations have been carried out to establish the causes of leakage occurring in long-term gas-oil storage tanks. All evidence obtained indicates corrosion being due to the action of sulphate-reducing bacteria rather than any other corrosion effect. Recommendations for the cleaning, repair of tanks are given. Failure Diagnosis and Investigation. D. Scott, Tyibology, 3 (I) (‘970) 22-28; 6 figs., 44 refs. The diagnosis and investigation of tribological failures are discussed. The uses of various investigational techniques are described and illustrated by examples from the work of N.E.L. The use of inspection techniques for the diagnosis of impending failure and its prevention is outlined. It is emphasised that tribological failure mechanisms are becoming increasingly complex with the result that it is

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Literature not always possible to give reliable on-site diagnosis. A full investigation on a multidisciplinary scale using all relevant investigational techniques is often the only way to ensure complete remedial action. Long experience and study of failures produced both in the field and under controlled conditions in the laboratory is invaluable. DEFORMATION, FRACTURE (no abstracts) 2. SURFACE PROPERTIES, AND FRICTION 2.1. Surface properties (no abstracts)

2.2.

FLOW

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ADHESION

Adhesion andfriction

Friction and Thickness of Heavily-Loaded Oil Films. Yu. N. Drozdov and H. F. Reshchikov, Russian Eng. J., 48 (12) (1~68) S-II ; 6 figs., 2 tables, 12 refs. (Transl. by P.E.R.A. of Gt. Britain of Vestlz. Mashinostr., 48 (12) (1~68) 9-12.) Formulae are proposed satisfactorily to characterise the qualitative and quantitative influence on the parameters included in them on the coefficient of sliding friction. The formulae can be used to determine the coefficient of friction under conditions of oillubricated rolling and sliding. The Effect of Boundary Lubricants on the Friction of Cast Iron. C. Albertson and G. Wolfram, Lubrication Eng., 2.5 (12) (1969) 469-474; 3 figs., 6 tables, 5 refs. Static and dynamic friction tests in o-100% additive-white oil blends of constant viscosity, with cast-iron specimens showed that friction was nearly the same from I-100% additive concentration at o-50 ft./min sliding speed for several boundary lubricants. The base white oil appears to act only as a dilutent for the five additives studied. The small effect of additive concentration indicated that they were nearly fully adsorbed at 1% concentration. Friction data taken with acid additives required normalising probably due to chemical wear or corrosion of the metal surfaces which decreased dynamic friction because the surfaces became smoother and promoted fluid-film lubrication. Wear, 15 (1970) 297-306