Corrosion Preventatives soluble in Oil and Solvents
• Mineral oil
Also the nature of the protective film needs to be defined
• oily film
• dry waxy film
• vaseline like film
• film thickness
Finally the use of dewatering additives may be required.
Oily films can be formed by blending oil soluble rust preventatives with oil. Since the carrier fluid will not evaporate the film consistency will remain oily depending on the viscosity of the oil. Dry, waxy or vaseline like films require the use of solvents which will later evaporate. Generally combinations of both carrier fluids are used in practice.
The desired performance of the rust inhibitor depends on the storage conditions of the metal piece to be protected. Difference is made between indoor and outdoor storage as well as the ambient conditions.
The thickness of the film, together with its type and composition determines its rust protection properties.
In general temporary rust protection films should be easy to remove to facilitate further processing without leaving any residues on the metal surface. In the majority of cases the films can be removed easily using alcaline media.
The duration of the rust protection is important for the selection of additives to be used. Long term rust protection particularly for external storage commonly requires the use of films with high levels of adhesion which need the use of solvents or steam to remove them.
In some cases special properties such as rapid demulsification, acid fume resistance properties are of particular interest. Also the use of barium based additives could be effective.
Additiv-Chemie offers a comprehensive range of additives for temporary rust protection. Recommendations for use should be considered on a case by case basis paying regard to the above criteria.
Dewatering fluids can be formulated with packages for temporary rust protection with a focus on water displacement and excellent wetting properties. The protective period is generally slightly shorter but the film can be easier removed.
Special Rust preventatives
• temporary rusts protection for steel coils
• rust protection for greases
• long term rust protection for outdoor storage
Yellow Metal Inhibitors, oil soluble
A range of products for the protection of yellow and other non-ferrous metals is available for use in cutting oils and greases which are easy to blend into the oil being used. This includes TTZ and BTZ containing formulations.