A conversion coating is a chemical treatment applied to manufactured parts that superficially converts the material into a thin coating of an insoluble compound. These coatings are commonly applied to protect the part against corrosion, improve adherence of other coatings, lubrication, or decoration.

Our chromate conversion coating for aluminum involves the following steps:

• Degreasing and rinsing to remove oil, grease, oxides, and heavy metallic impurities
• Deoxidize and desmut
• Chromate treatment by immersion
• Rinse
• Dry

Due to its broad range of capabilities, chromate conversion coatings are utilized throughout a wide range of industries including:

• Automotive
• Aviation & Aerospace
• Buildings & Architecture
• Electronics
• Marine
• Medical/Dental Equipment
• Military/Law Enforcement
• Sporting Goods

At Arrow Cryogenics we use a unique chemical solution for our chromate conversion coatings. Our conversion coatings are hexavalent free and are compliant with NADCAP, RoHS and WEEE directives. Arrow Cryogenics is also ISO 9001:2015 certified.

Chromate conversion coatings have been in use since at least the 1960s; however, the hexavalent chromium chemicals used have been found to be highly toxic. Arrow Cryogenics uses a unique chemical solution for our chromate conversion coatings that does NOT contain hexavalent chromium.

AC7000 – AUDIT CRITERIA FOR NADCAP ACCREDITATION

AC7108 REV I – NADCAP Audit Criteria for Chemical Processing

• AC7108 Anodize; Hard Anodize and Sulfuric Anodize (Not for Metal Bond) – AC7108/8 must also be selected
• AC7108 Chromate (non-hexavalent)
• AC7108 Passivation
• AC7108 Electropolish
• AC7108 Standalone Cleaning
• AC7108 Descaling
• AC7108 Solution Analysis & Testing – AC7108/4 must also be selected
• General Cleaning & Pre-Cleaning
• Alkaline Cleaning
• Chemical Cleaning
• Titanium Cleaning
• Emulsion Cleaning
• Semi-Aqueous Cleaning
• Solvent Cleaning
• Ovens for Thermal Treatments – Heat Processing; Part Dying
• Stripping of Coatings
• Inorganic Coatings
• Other Stripping

AC7108/4 REV C – NADCAP Audit Criteria for Solution Analysis and Testing in Support of Chemical Processing to AC7108

• Solution Analysis (In Support of AC7108)
• Testing Performed Internally (In Support of the Chemical Process Accreditation)
• B05 – Salt Spray Testing (In Support of Chemical Process Accreditation)
• B06 – Water Immersion / Humidity Testing (In Support of AC7108)
• B09 – Taber Wear Testing (In Support of AC7108)
• B10 – Adhesion Testing (In Support of AC7108)
• B13 – Coating Weight Testing(In Support of AC7108)
• B 14 – Conductivity Testing (In Support of AC7108)
• B15 – Resistivity Testing (In Support of AC7108)
• B16 – Coating Thickness Measurement (In Support of AC7108)
• B23 – Other Testing (In Support of AC7108)

AC7108/8 – NADCAP Audit Criteria for Anodizing (Not for Metal Bond)

• Anodized Aluminum, Hard Anodize
• Anodize Aluminum, Sulfuric Acid
• Dye
• Seal

AC7108/11 – NADCAP Audit Criteria for Conversion Coating

• Aluminum, Non-Hexavalent Chrome Alternatives

AC7108/12 REV A – NADCAP Audit Criteria for Standalone Cleaning, Descaling, Passivation, and Electropolishing

• Passivation