CR – 2001.Corrosion Removing Compound, Sodium Hydroxide Base, for Electrolytic or Immersion Application.
Code : P00218 | 
| 
(SDS)
Description
CR-2001 is a powder, alkaline corrosion-removing compound suitable for rust removal by simple immersion of the article or by electrolytic action without causing material change in the dimensional characteristics of the treated article.
CR-2001 meets the requirements of specifications, MIL-C-14460 TYPE I, A-A-59260 and AMS-1379A TYPE II (powder).
Application
CR-2001 effectively removes rust, oil, grease, carbon, scale, paints and is mainly used for:
- rust, carbon, oil, grease and paint removal in one operation.
- heat scale conditioning for aircraft engine compounds.
- processing steel prior to phosphating
- processing magnesium prior to DOW coating.
- preparation of cast iron and steel in electrolytic tank, prior to plating.
- Any application where an alkaline, corrosion, rust and paint remover is required.
Usage
CR-2001 is used in dip tanks.
The immersion time depends on the amount of soil to be removed but generally a 15 - 60 minutes immersion time is sufficient to remove the most soil.
Air or mechanical agitation of the solution reduces the immersion time.
It is safe on ferrous, magnesium, titanium and stainless steel but should not be used on aluminum, tin, zinc and their alloys.
Recommended concentration and temperature limits
Rust, carbon and paint removal: 15 – 40% in water at 90o – 100oC. Heat scale conditioning: 25 – 40% in water at 90o – 100oC. Titanium cleaning: 5 – 7% in water at 70o – 75oC.
Magnesium cleaning: 3 – 4% in water at 90o – 100oC.
Tank construction
Tank may be constructed of mild steel with stainless (type 316) heating unit.
Directions for electrolytic use
Recommended concentration: 6 –20% in water at 85-95oC. Voltage: 6-8 volts.
Amperage: 10 – 25 Ampere per dm2
Fast results are obtained by a short anodic cycle (30-60 seconds) followed by cathodic cycle for remainder of immersion time.
To keep hydrogen embrittlement within acceptable limits, a 30 seconds cathodic cycle followed by 60 – 120 seconds anodic cycle, repeated until parts are clean, is recommended.
Rinsing
The rinsing should be done either by overflowing, agitated water rinse (preferably hot), hot or cold water with pressure or with a steam cleaner.