Nadcap Anodizing

NADCAP Certified Aluminum Anodizing

There is often confusion between electroplating and anodizing. Despite their apparent similarities, electroplating and anodizing serve different functions. Similar to armor, electroplating adds a layer of one metal on top of another. Anodizing, on the other hand, strengthens a metal by thickening the oxide layer on its surface. For example, anodization provides aluminum with a harder aluminum oxide surface that improves durability and protection. Using a variety of different acid solutions, which create different anodic coatings, our Nadcap anodizing has  the ability to meet stringent criteria for corrosion protection and electrical conductivity. We offer chromic acid, sulfuric acid and the Boeing patented boric-sulfuric acid anodizing processes with a number of different sealing solutions.

Boric-Sulfuric Acid Anodize (BSAA)

MIL-A-8625, Type IC
MIL-PRF-8625, Type IC
Boeing: BAC 5632

For environmental reasons, Boeing Aircraft developed boric-sulfuric acid anodize to replace chromic acid anodize. Unlike traditional sulfuric acid anodize, the coating is very thin, comparable to the chromic acid it is replacing. Wolkerstorfer Company is a licensed applicator of this Nadcap anodizing coating, which meets MIL-A-8625, Type IC and Boeing’s BAC 5632. We are capable of processing parts up to 10 feet in length and 2,000 pounds. We are Nadcap certified for this process.

Chromic Acid Anodize (CAA)

AMS 2470
MIL-A-8625, Type I and IB
MIL-PRF-8625, Type I and IB
Gulfstream: GAMPS 6201
Rockwell Collins: 580-0008
Sikorsky: SS 8483

Chromic Acid Anodize meets the requirements of Mil-A-8625, Type I and IB, as well as AMS 2470. Although CAA has a very thin coating deposit, it still provides excellent corrosion protection when compared to the other anodized coating systems. CAA also provides an exceptional pretreatment for various paint systems. We are capable of handling parts up to 8 feet in length and 2,000#. We are Nadcap certified for this process.

Sulfuric Acid Anodize (SAA)

AMS 2471
MIL-A-8625, Type II and IIB
MIL-PRF-8625, Type II and IIB
Rockwell Collins: 580-0008
Sikorsky: SS 8483

Sulfuric Acid Anodize is a coating that provides better abrasion resistance than the other typical anodize systems, with the exception of hardcoat. Meeting Mil-A-8625, Type II and IIB, SAA provides an excellent pretreatment for various paint and dry film systems. our Nadcap anodizing team is capable of handling parts up to 8 feet in length and 2,000# in weight. We are Nadcap certified for this process.

Post Anodize Seals

At the completion of the Nadcap anodizing process there are a number of seal options to consider. A fresh anodized surface is an anhydrous oxide that is hydrophilic, or simply put, a coating looking to be wetted. Wetting can occur through immersion but also from the moisture in the air, hence the reason to move quickly with the fresh anodize surface. Typically a “sealing” process is called out on the print or specification. Each coating has certain favorable traits, depending on the type of anodizing system used. We offer nickel acetate, hot water and dilute chromic acid seal systems to meet a variety of aerospace and military specifications.

The “Wolkerstorfer Way” – Exceptional quality with responsive lead times.