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Uszkodzenia powierzchni szyb: naprawa czy wymiana?

Borkowicz A.

Świat Szkła

2016

R. 21, nr 3

40--42

Naprawa i przebudowa nawierzchni asfaltowych

Bańkowski W.

Builder

2009

R.13, nr 3

68--71

Influence of mechanical damage on corrosion resistance of plates used in funnel chest treatment

Krauze A., Kajzer W., Dzielicki J., Marciniak J.

Journal of Medical Informatics & Technologies

2006

Vol. 10

133--141

The paper presents influence of mechanical surface damage on corrosion resistance of plates made of Cr-Ni-Mo stainless steel, used in funnel chest treatment. The surface of the steel was electrochemically polished and fitted. The surface damage is induced in the given deformation regions and is a potential reason of corrosion. The corrosion tests were realised by recording of anodic polarization curves with the use of the potentio-dynamic method. The VoltaLab® PGP 201 system for electrochemical tests was applied. Additionally, the tests showed that the structure of the steel the plates were made of, met the PN-ISO 5832-1 standard. On the basis of the obtained results it can be stated that that stainless steel can be applied in funnel chest treatment.

Surface durability of steel rollers lubricated by fresh and used engine oils in comparison with gear oil

Ishibashi A., Sonoda K., Sunagawa Y., Shoji R.

International Journal of Applied Mechanics and Engineering

2004

Vol. 9, no spec.

79-85

The lubricating oil used for the gasoline engine of passenger cars has been exchanged for a fresh oil after running a distance in the range of 3.000 to 10.000km, in Japan, in most cases. In the present investigation, used engine-oils were obtained by two different methods; (1) the oils were gathered at a car service centre, or (2) produced using test cars and fresh engine oils. The fresh and used engine-oils were chemically analysed and the amounts of nine elements (S, Cl, P, Zn, Pb, Mo, Fe, Al, Ca) in the oils were compared with those of a gear lubricating oil. Using a four ball tester, scoring load for the test oils were measured and then surface durability tests were conducted using a two roller testing machine. Many pits occurred at a Hertzian contact pressure of 1.000MPa on the steel rollers with a hardness of 180HB when a fresh engine-oil or the gear oil was used for lubricating the rollers. However, not a single pit occurred at the same contact pressure up to 10 million rotations when the used engine-oil was used. The reason for the higher surface durability was explained using the results of the chemical analyses and scoring tests.