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Olive Drab Green Chromate

Olive Drab Green Chromate
SKU ODK27
Weight 1.00 lbs
Our price: CA$62.08
Qty

Caswell Olive Drab Chromate will impart an heavy, non-iridescent olive drab green coating over zinc or cadmium deposits. The finish also serves as an excellent base for paint.

MIXING:

DO NOT USE OLIVE DRAB CHROMATE AT FULL STRENGTH. DO NOT PRE-MIX PART I AND PART II. A VIOLENT REACTION MAY OCCUR.

  1. In a plastic tank (HDPE preferred) add 2 US Gallons of distilled water.
  2. Add 8 fl oz Olive Drab Part I and mix with a plastic mixer
  3. Add 8 fl oz Olive Drab Part II and mix with a plastic mixer

Solution is now ready for use. Use at 70-90 deg F. If heating use Stainless Steel heaters (No Titanium) Air agitation recommended but not required.

OPERATION: 

  1. Zinc or cadmium plate the part
  2. Rinse with distilled water
  3. Dip in a 5% solution of muriatic or hydrochloric acid for 5 secs (not required but recommended)
  4. Rinse with distilled water
  5. Dip in Olive Drab Chromate for 15-60 seconds
  6. Rinse with distilled water
  7. Dry with warm air not exceeding 160 deg F.

TROUBLESHOOTING:

 

Problem

 Cause

 Solution

Dull streaks/bare spots

Poor rinsing after plating or chromating

 

Chromate is too strong

Increase rinsing. Add air agitation to rinse water.

 Dilute chromate

 

Bronze to reddish color

Temperature is too high

Concentration of chromate is too high Concentration of Olive Drab II too low

Lower chromate

Dilute chromate

Add Olive Drab II

 

Olive color too iridescent

High pH

Lower pH

 

Dull powdery film; loose and non-adherent

Rinse or dryer too hot

Adjust temperature to 120°F (50°C) or less

 

Poor corrosion resistance

Temperature of dryer over 160°F (71°C); dehydrates the  film

pH too high

Reduce temperature

 

Lower pH

 

Olive Drab Green Chromate - makes 2 Gal

Hazardous Goods - must be shipped by Purolator Ground

Olive Drab Chromate I MSDS

Olive Drab Chromate II MSDS

 

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