Trivalent Chromate Finishes for Zinc

E-Chrome Ultra Blue & Yellow - Trivalent chromates that provide superior corrosion resistance.

Tired of having to do multiple dips to achieve a bright chromate and high salt spray resistance? Look no more! Now you can have it all with EPI's E-Chrome Ultra Blue & Yellow, the next generation chromate.

Key Features of E-Chrome Ultra Blue Chromate and E-Chrome Ultra Yellow Chomate:

• Bright yellow or blue trivalent chromate
• High corrosion resistance
• Single dip
• No top coat needed
• Easy to control - operator friendly
• Stable bath with long life
• Utilize for both rack and barrel chromating
• Can be used with automatic feeder equipment
• Meets all automotive and industrial standards

Start taking advantage of E-Chrome Ultra Blue and Yellow today!

• Call 1-262-786-9330 to order a sample of our chromate finishes.
• Send sample parts for trivalent chromate or need more information? Use our online request form.
• Click links to see product information on E-Chrome Ultra Blue trivalent chromate or E-Chrome Ultra Yellow trivalent chromate.
• Need more information about Trivalent Chromates? Read our new Trivalent Chromate FAQ.

E-Chrome Ultra Blue High Corrosion Resistant Trivalent Blue Chromate

E-Chrome Ultra Blue trivalent blue chromate passes 150 hours salt spray to white rust (corrosion) and 160-200 hours to red rust (corrosion) per ASTMB-117.  No additional top coat is required to obtain this high degree of corrosion resistance.

The E-Chrome Ultra Blue is a true blue color that does not exhibit a yellow hue like other blue trivalent chromates.

E-Chrome Ultra Blue is a two component chromate.

Bath Make-Up   OPTIMUM   RANGE E-Chrome Ultra Blue 2% by volume   1-3% by volume E-Chrome Ultra Blue HP 2% by volume   1-3% by volume

Step by Step Application Plating on zinc-plating surfaces with E-Chrome Ultra Blue is accomplished as follows: Zinc plate parts to .0003". The brightness of the final finish will be directly related to the brightness of the plated surfaces. Cold water rinse 1% by volume Sulfuric Acid or Nitric Acid rinse to neutralize residual plating solution Cold water rinse Immersion in E-Chrome Ultra Blue solution for the length of time required to produce the desired finish. Cold water rinse Hot Air Dry - 150° F

Operating Conditions   OPTIMUM   RANGE pH*: 1.8   1.5 - 2.0 TEMPERATURE: 75° F (24° C)   65°-90° F TIME: 20 seconds   1-40 seconds AGITATION: Air agitation may be helpful in rack situations * Lower pH with Nitric Acid; raise pH with Ammonium Hydroxide

 



• E-Chrome Ultra Yellow - High Corrosion resistant trivalent chromate. E-Chrome Ultra Yellow is a two part iridescent trivalent chromate that provides up to 150 hours salt spray resistance to white corrosion with out a topcoat. It does not rub off like other yellow trivalent chromates as it will pass the thumb test. E- Chrome Ultra Yellow offers more UV protection and does not fade in the sun like other yellow trivalent chromates.
  
  Read our Trivalent Yellow Chomates technical paper that was presented at the Sur/Fin 2007, the NASF Technical Conference. In addition, you may also want to read the follow up technical paper presented at Sur/Fin 2008, "Trivalent Yellow Chromate New Discoveries & an Answer to Plating & Surface Finishing".
  
  The greatest benefit of E-Chrome Ultra Yellow is that it can be baked for hydrogen embrittlement (375º F 4-24 hours) without the color fading. After baking this corrosion resistance to white rust almost doubles to 300 hours!
  
  E-Chrome Ultra Yellow is a two compound chromate.

Bath Make-Up   OPTIMUM   RANGE E-Chrome Ultra Yellow A 3% by volume   2-3% by volume E-Chrome Ultra Yellow B 2% by volume   1-3% by volume

Step by Step Application Chromating on zinc-plating surfaces with E-Chrome Ultra Yellow is accomplished as follows: Zinc plate parts to .0003. The brightness of the final finish will be directly related to the brightness of the plated surfaces. Cold water rinse 1% by volume Sulfuric Acid, rinse to neutralize residual plating solution Cold water rinse Immersion in E-Chrome Ultra Yellow solution for the length of time required to produce the desired finish. Cold water rinse Hot Air Dry - 150° F

Operating Conditions   OPTIMUM   RANGE pH*: 1.8   1.65 - 2.0 TEMPERATURE: 120° F (54° C)   90°-150° F (32° - 66° C) TIME: 1 minute   30 seconds - 5 minutes AGITATION: Air agitation may be helpful in rack situations * Lower pH with E- Chrome Ultra Yellow A and B; raise pH with Ammonium Hydroxide

 

Hexavalent Chromate Finishes for Zinc and Cadmium

• E-Chrome 851-L — A yellow/bronze iridescent finish on plated cadmium and zinc. Liquid concentrate is used at 0.5% to 3% by volume in water at 65° to 90°F. The finish has outstanding resistance to salt spray, greatly surpasses the normal 96 hour salt spray resistance specified for yellow chromates on zinc. It will withstand up to 200 hours salt spray. The deposit is a pleasing finish in itself. It is an excellent base for paint. The finish may be dyed to various colors.
   
• E-Chrome 854-L — Olive drab finish for plated cadmium and zinc surfaces. Produces the maximum in salt spray and abrasion resistance for chromate finishes. Produces an excellent base for paints and can be used to replace primers. Consists of two liquid concentrate components which are each used at 10% by volume in water at 75° to 90° F.
   
• E-Chrome 860-L — Clear to blue bright finish for zinc/cadmium plated surfaces without leaching. Brightens, passivates and protects zinc surfaces from staining, finger marking, discoloration and corrosion. It can be used on automatic lines as well as manual lines. Liquid concentrate is used at 0.75% to 1.5% by volume in water at 65° to 80° F.
   
• E-Chrome 861 — Black chromate for zinc which is superior to ordinary black chromates because it produces a harder, more adherent finish which is non-iridescent and much more uniform in color, while exhibiting corrosion resistance with resistance to several hundred hours of salt spray before white rust. Temperature 60° to 100° F.
   
• E-Chrome 865 — A black chromate conversion finish for electro-deposited zinc or cadmium by immersion. It is especially effective for chromating bolt parts such as nuts, bolts and various fasteners.

  View all of our chromate products.