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Products for Anodizing and Chromate Conversion / Additive: CHEMEON AA-200

CHEMEON Anodizing

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It is a proprietary anodizing chemical additive utilized in sulfuric acid anodizing electrolytes to improve the performance of the resulting anodized surface and facilitate the anodizing process itself. The additive is specially formulated to prevent the aluminum from burning during the anodizing process. Decreasing the tendency for burning allows a high quality, uniform oxide to form even when anodizing at higher current densities which, in turn, decreases the anodize time and allows for increased production. Using AA-200 during anodizing has been proven to produce a harder, more dense and consistent coating.

In addition to offering AA-200 as a stand-alone additive, CHEMEON also offers the "CHEMEON AA-200 Anodize Process", which combines the benefit of the AA-200 additive with process control elements to succeed where conventional anodizing fails. For example, the CHEMEON AA-200 Anodize Process Technology was licensed to VISTEON Automotive for use on the revolutionary slip in tube (“SIT”) drive shaft for Jeep Grand Cherokee. The CHEMEON process was required to pass tests necessary to convert this part from steel to aluminum for the first time ever. CHEMEON is jointly listed with VISTEON Automotive in the U.S. patent for this particular application.


CHEMEON AA-200* Capabilities 
MILITARY-A-8625F Compliant
Process Anodizing
Anodizing Type II (Sulfuric)
Anodizing Type III (Hard Coat)
Industry Specifications and Standards
MIL-A-8625 F
ASTM B 117
ASTM B 680-80
Product Advantages
Superior corrosion protection, hardness, and abrasion resistance
Improved consistency and uniformity of oxide
Improved resistance to burning
Operation at higher current densities
Improves efficiency - reduces decants
Superior quality, smoothness, and lubricity
Reduces overall operating costs
Type II 0.4-0.6% v/v, temp 70±2°F
Type III 0.7-0.9% v/v, temp 28-50°F
Corrosion Resistance Over 4,000h 
Desired Oxide Thickness Desired oxide thickness within 2-5% (based on processing by current density)
Process Capability Index (Cpk) Cpk of 2.54
Coating Formation Rate High and consistent rate, with ability to run at higher current density without burning
Abrasion Resistance Taber abrasion of 0.89 mg/1,000 cycles on tested 6061-T6 samples
Micro Hardness Tested samples surpass ISO 10074 Acceptance Value by 25-30% or more
Build-up Rate
Better control, analysis, and slower rate of aluminum bath anodizing build-up 
Customers previously decanting every 3-4 weeks report reducing that to 6-12 months between decants
Coating Weight and Conversion Efficiency Conversion efficiency 78-97%
Sealing Quality Meet or exceed ISO 7599 specification in all cases

* In 2013, CHEMEON Surface Technology, formerly Metalast Surface Technology, acquired all assets of Metalast International, LLC, and is the sole source of products and services known and marketed as Metalast prior to June 10, 2015, now marketed under the CHEMEON mark. CHEMEON is not affiliated with David M. Semas.