DEGREASING WATER-SOLUBLE RUST PREVENTIVE OIL

[JBP00]

Hi Everyone!

I have a problem with a contaminant (Water-Soluble Rust Preventive Oil) -Chinese Standard SH/T 0692-2000 applied to the Prestressed Concrete Strands we are currently supplying. We never encountered this problem before that the oil is not vaporizing through air exposure since all of the shipments has oil applied to the strands. Thus, there is bonding slippage on concrete and strands that our customer pointed out since there is too much oil applied to it.

I have posted on the Concrete Precast Forum and they advised me to seek a Chemical Engineer / Chemist that can suggest a solvent to remove the oil without too much labor and cost-effective as well.

We have 32 coils (88mt) affected and we are researching for a solvent that we can dip/bath the coil and air-dry it.

Hope to receive your insight and expertise regarding this issue. Thanks.

JBP

 

[Compositepro]

Vapor degreasing is the most effective method of removing oils. Dipping in solvent is not so effective because the solvent becomes contaminated and leaves a residue. Detergent and water can be used but will likely cause some rusting.

 

[JBP00]

Compositepro,

Thanks for the response, may you inform me the basic requirements for this solution?

 

[JBP00]

Hello everyone,

One of degreasing firm here informed me that it is possible to dip the coils in an emulsifiable degreaser. I would like to ask for your insights regarding the penetration of the degreaser for the whole coil on degreasing bath.

TYPICAL CHARACTERISTICS:
Specific Gravity @ 15.6 °C 0.797
Appearance Clear
Flash Point, TCC, °C 40.6
Color, ASTM + 28
Appearance of Emulsion Milky White

JBP