Water Soluble Oils

Rust and Corrosion Prevention/Inhibitors

Water Soluble (Emulsifiable) Formulations

E-Tec 510 and E-Tec 515 are corrosion inhibitors formulated with emulsifiers enabling them to be diluted with water to form a 5-20% oil-in-water emulsion. The characteristics of the deposited corrosion inhibiting films can be varied from oily (20% by volume), slightly oily (10% by volume)., to “dry-to-the-touch” non-tacky films (5% by volume). Film thickness, dry time, and coverage varies with the concentration. Typically, a 5% concentration of E-Tec 510 will produce approximately 24 hours resistance to 5% salt spray, a 5% solution of E-Tec 515 produces approximately 50 hours salt spray resistance, and 96 to 150 hours resistance is obtained with 20% solutions. The E-Tec 515 is formulated to give a higher degree of corrosion resistance than the more economical E-Tec 510.

E-Tec 512 is a high performance corrosion prevention formula with emulsifiers and waxes and used at full strength or diluted with up to 50% by volume with water and used at 70 degrees F to 130 degrees F. E-Tec 512 is a rust preventive that provides an extremely thin, waxy, dry-to-the-touch superior corrosion inhibitor film and provides up to 150 hours salt spray resistance on hot black oxide (See note on salt spraying).

E-Tec 512 provides excellent lubricity and anti-wear characteristics as conducted with Falex tests.

E-Tec 512 corrosion prevention chemical can be used over EPI’s Ultra-Blak Black Oxide and Insta-Blak black metal finishes and the E-Phos zinc/manganese phosphate finishes and also over bare steel.

Application

The E-Tec 510 and E-Tec 515 emulsions are normally used at temperatures of 150° to 160° F to facilitate drying. Some experimentation should be done with sample parts at various dilutions to determine the type of film (oily to dry) and corrosion resistance produced prior to charging a production tank.

Plain steel tanks and equipment can be used to hold or apply the E-Tec solutions. The solution can be heated by gas, steam, or electricity and can be applied by dipping, spraying or brushing.

Wet or dry parts are immersed in the E-Tec solutions for one (1) minute. The solutions will tolerate a considerable amount of carry-over rinse water. Wet parts contained in a basket should be agitated to ensure complete removal of water from the surfaces. For applications on plain steel, maximum corrosion prevention is assured if the surfaces are free from corrosive materials, such as chlorinated and sulfonated cutting oils, coolants, lubricants, and drawing compounds.

When used as a sealant for EPI’s Insta-Blak or Ultra-Blak black chemical conversion metal finishes, the parts are immersed for one (1) minute in the E-Tec solution while still wet from the final rinse in the process. The E-Tec will displace the rinse water from the surface. It is recommended that baskets and rotating barrels used to contain parts for blackening and rinsing not be immersed in the E-Tec solutions because they will become coated with the E-Tec solution. Any run-off would contaminate the other solutions in the process when the containers are transported back to the beginning of the line.

The E-Tec tank should contain an unload chute and catch basket(s) to receive the parts upon unloading of the baskets and barrels.

Tanks should be kept covered when not in use to minimize evaporation of water.

The E-Tec solutions are formulated to dry fairly rapidly at ambient temperatures and parts or work may be unloaded directly into tote pans or bins and allowed to dry. Heated, forced air drying in ovens or on perforated conveyor belts will accelerate drying. Small parts can be rapidly dried in spin dryers.

NOTE:

If difficulties are encountered in obtaining a good emulsion (milky white solution) due to the hardness of the local water, the addition of 3% by volume Butyl Cellosolv is recommended. Emulsions are readily obtainable with water and D.I. water is recommended for charging a new tank.

E-Tec finishes may be removed with solvents, chlorinated solvent vapor degreasers or with EPI’s E-Kleen alkaline soak cleaners.