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Jean-Pierre KERHERVÉ: Master of Science - Laboratory Manager, Société des Produits Chimiques Auxiliaires et de Synthèse (PCAS)
INTRODUCTION
Temporary protection is a technique used to prevent the deterioration of finished or semi-finished products during handling, transport or storage. The main types of alteration that can occur are: corrosion of metal parts, tarnishing of paintwork, scratches, abrasions, shocks, etc. and, in general, any surface modification likely to depreciate the items in question, or even render them unfit for use. The technique consists in covering the objects to be protected with a film which must first provide the required protection for a given period of time, then be removable when the object is used, or before a definitive protection is applied (paint, metallic coating, etc.).
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Temporary protection films
Choosing a protector
1.Standardization of industrial lubricants
The efforts of ISO member countries led to the creation of standard NF ISO 3448 (T 60-141), which classifies industrial lubricants according to their viscosity at a reference temperature of 40°C.
ISO 6743-99 and NF T 60 -162 classify lubricants into families, according to application. Lubricants have been classified into 18 families, listed by letter.
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2.ISO 6743 -X classifications
The ISO 6743-99 family classifications are presented in the form of 8-column tables.
The first four columns are generally fixed. The first two show the ISO 6743-99 letter symbol and the general application. The next two columns refer to particular and more specific applications. The fifth column gives special properties, the sixth the ISO L symbol, the seventh a description of applications,...
3.NF ISO 6743 - 8 (T 60 - 505) classification of R products for temporary corrosion protection
A French group was responsible for drawing up this classification, which was finalized in April 1987.
3.1 Type of products R
Products covered by the classification can be used to protect both bare and coated metals, i.e. to protect against all types of surface deterioration caused by environmental conditions....
4.Product specification R
There are currently no international specifications for protective products. Some users have drawn up specifications for their particular applications, often using in-house, non-standardized test methods. These users are either manufacturers or organizations, most often military (US Army: MIL), French Ministry of the Armed Forces (AIR), Direction centrale du service des Essences des Armées (DCEA).
...5.Conclusion
International standardization of industrial lubricants has always lagged far behind that of lubricants for gasoline and diesel engines and automotive transmissions. This gap is now closing, thanks to the tenacity of a number of expert groups.
ISO 6743 - 8 classification and ISO/TS 12928 documents exist thanks to a group of French experts who have been working since 1979.
The...
Standardization
French Standards Association (AFNOR)
International Organization for Standardization (ISO)
The Association Française de Normalisation (AFNOR), representing ISO and CEN in France, provides readers with collections of French...
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