Conversion Coating

Conversion coating collage heading

801-972-2146

info@pilkingtonmetalfinishing.com
1225 S. Legacy View St.
Salt Lake City, Utah 84104
P.O. Box 25657
Salt Lake City, Utah 84125-0657

CERTIFICATIONS

Iso black
Nadcap black
Itar black

CERTIFICATIONS

Iso black
Nadcap black
Itar black

DOWNLOAD LITERATURE

Descriptive, print-ready pages for engineers and purchasing agents.

DESCRIPTION

This coating is often referred to as “Chem Film”, “Alodine”, “Iridite”, or “Conversion Coat”. Chromate Conversion Coating is a chemical process that forms a thin, protective layer on the surface of aluminum. Commonly used as an undercoat to promote adhesion and guard the base metal from corrosion. On a molecular level, it is gel-like and has self-healing properties. This coating also helps to retain electrical conductivity.

The Restriction of Hazardous Substances Directive (RoHS) was adopted by the European Union in 2003. This restricts importing of products containing toxic materials- including Lead, Mercury, Cadmium and Hexavalent Chromium. The industry has since developed RoHS compliant chromate conversion coatings by substituting Trivalent Chromium.

These coatings meet all performance requirements and can be found on the federal standard Qualified Product List, MIL-DTL-81706. Commonly used as an undercoat to promote adhesion and guard the base metal from corrosion. This coating also helps to retain electrical conductivity.

FINISH SAMPLES

Please contact customer service and request a complete packet of our physical samples.

SIZE CAPABILITIES

PROCESS TANK SIZE NADCAP CERTIFIED
Conversion Coating (Ty I) 14' x 6' x 4' No
Certified Conversion Coating (Ty II) 7' x 4' x 3' Yes
RoHS Compliant Conversion Coating (Ty II) 7' x 4' x 3' No

PRINT CALLOUT GUIDE

The following are examples of finishing callouts that would be found on a print or purchase order and would indicate specific anodizing processes for a metal finisher like Pilkington Metal Finishing. These guides are meant for use by engineers and purchasing agents.

Note: If surfaces to be coated are not specified, all surfaces will be coated by default.

Apply MIL-DTL-81706, Type I Conversion Coating in accordance with manufacturer’s directions.

For Certified Work per a Specification:

Click on the tip icon for detailed information

Apply Type I, Class IA Conversion Coating per MIL-DTL-5541 F.

Note that referencing specifications will often require additional processing, testing, and documentation of suppliers.

Apply MIL-DTL-81706, Type II Conversion Coating in accordance with manufacturer’s directions.

For Certified Work per a Specification:

Click on the tip icon for detailed information

Apply Type II, Class IA Conversion Coating per MIL-DTL-5541 F.

Note that referencing specifications will often require additional processing, testing, and documentation of suppliers.

SPECIFICATIONS

The following is a list of applicable specifications for conversion coating along with their title and issuer. Pilkington commonly processes to these specifications and is capable of processing to many more upon request.

SPECIFICATION TITLE CUSTOMER
BAC5719 Chemical Conversion Coatings for Aluminum and Aluminum Alloys Boeing
CP3210 General Purpose Coating – Chemical Conversion Coatings for Aluminum and Aluminum Alloys – Commercial Use Williams Intl.
CP3212 Low Electrical Resistance Coating – Chemical Conversion Coatings for Aluminum and Aluminum Alloys – Commercial Use Williams Intl.
MIL-C-5541 Chemical Conversion Coatings on Aluminum and Aluminum Alloys Industry Standard
MIL-DTL-5541 Detail Specification Chemical Conversion Coatings on Aluminum and Aluminum Alloys Industry Standard
P3210 General Purpose Coating – Chemical Conversion Coatings for Aluminum and Aluminum Alloys Williams Intl.
P3212 Low Electrical Resistance Coating – Chemical Conversion Coatings for Aluminum and Aluminum Alloys Williams Intl.
P3214 General Purpose Non-hexavalent Chromium Coating – Chemical Conversion Coatings for Aluminum and Aluminum Alloys Williams Intl.
P3216 Low Electrical Resistance Non-hexavalent Chromium Coating – Chemical Conversion Coatings for Aluminum and Aluminum Alloys Williams Intl.

FREQUENTLY ASKED QUESTIONS

Q: I have a product to be coated, do you recommend anodize or conversion coating as pretreatment?

Conversion Coating of aluminum provides a fantastic sub-surface treatment to a paint job. Iron Phosphate would be used on steel parts. Anodizing is typically used as a final finish. Both are rust inhibitors.

Q: What materials can be conversion coated?

We recommend Aluminum and Magnesium.

Q: How does Conversion Coating help with electrical conductivity?

Anodized aluminum is not electrical conductive and will not ground well. Conversion coating over aluminum is electrically conductive and will ground well.

Q: Why would I use RoHS compliant conversion coating?

Typically used in European and Asian contries, RoHS is a requirement. RoHS compliant has to do with chrome content. Chromate conversion coating is great, hexavalent chrome vs. trivalent chrome.