Preservative-stamping oil Volgol-131 has been developed on the basis of a mixture of high-purity mineral
oil and a group of additives that impart the desired service properties to the given product. The oil can be
used in stamping operations and to provide long-term corrosion protection to cold-rolled products that
have undergone electrolytic or hot galvanizing. The oil can be applied to the surface of the metal by
dipping, rubbing, or spraying (including electrostatic spraying). One of the newest products of the
company Volgokhimneft’ is water-soluble preservative Volgol-500, which was developed to preserve sized
rolled products at any stage of the production process, as well as to preserve metal parts and finished
products during storage, transport, and use.
Protecting metal from corrosion is an important problem – a problem whose solution would realize a substantial sav-
ings in material resources. One possible solution is treating the surface of metal with a special preservative oil which passi-
vates and inhibits the metal, creating a protective film on its surface that is resistant to water and electrolytes and is imper-
meable to hydrogen.
Metallurgical and automotive plants presently protect metallic rolled products with various Russian-made and
imported preservative oils. Sheet metal arriving at automotive plants with a protective coating of such oil is subjected to
stamping operations that also employ special lubricants. The mixture of incompatible oils that is formed on the surface of
the sheet results in the formation of different types of defects (rust, oxide spots, and yellow spots caused by polymerization).
In addition, films composed of products from the combustion of the lubricants are formed at the spots where welds are made
during the subsequent welding of the body of the automobile. These defects cannot be removed when the product is
degreased prior to its painting.
In recent years, leading European companies have developed and widely introduced new preservative-process oils
of the PRELUBE type at metallurgical and automotive plants. These oils protect the metal from corrosion for six or more
months, have good tribological properties which facilitate the stamping of parts of complex shape, are easily removed from
the surface of the metal, and are compatible with electrophoretic primers, paints, mastics, and adhesives.
The specifications for PRELUBE oils were developed by a group of specialists working for the German Automobile
Association (VDA). The researchers performed a large number of tests, generalized their results, and published a guide on
the use of these oils.
PRELUBE oil must meet the following requirements:
• be applied in an electrostatic field so as to form a layer with a unit mass in the range 0.5–3.5 g/m
• be able to be applied manually in the form of a layer with a unit mass in the range 2.0–5.0 g/m
• protect the surface of sheet metal from corrosion for at least three months;
• further protect the surface during storage for at least another three months;
• be readily removed from the surface after the product has been exposed to high temperatures and stored for 12
Metallurgist, Vol. 50, Nos. 7–8, 2006
DEVELOPMENT OF NEW PRESERVATIVES
T. A. Bliznetsov
Volgokhimneft’ Corporation. Translated from Metallurg, No. 8, pp. 73–74, August, 2006.
2006 Springer Science+Business Media, Inc.