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Aluminum Build up Rates Under Type II Anodizing Conditions
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Aluminum Build up Rates Under Type II Anodizing Conditions
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Aluminum Build up Rates Under Type II Anodizing Conditions
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From METALAST International, Inc.
 

 
A large number of coupons were anodized in two different electrolytes (traditional and METALAST) under Type II conditions to determine the relative aluminum buildup rates. The influence of process time (or the duration of parts stay in the tank) on the aluminum buildup rate was also investigated by anodizing coupons under similar conditions at different current densities (24 ASF and 18 ASF) to a given thickness of 0.7 mil (18 mm). The alloys used for this investigation include: 1100-H14, 2024-T3, 3003- H14, 5005-H34, 6061-T6, 6063-T52 and 7075-T6 alloys. The general aluminum build up rate was in the range of 0.93 ±?0.06 to 1.03 ±?0.09g/SF×20um when the anodizing current density was 24 ASF. Using a lower current density anodizing significantly increases the aluminum build up rate. The aluminum build up rate increased to 1.38 g/SF×20?m when the anodizing current density was decreased to 18 ASF.
Products & Services
Anodizing is a process for finishing aluminum alloys that employs electrolytic oxidation of the aluminum surface to produce a protective oxide coating.
Plating and anodizing equipment is used to apply a finish to a products to increase its durability or to resist corrosion.
Plating and anodizing chemicals and supplies consist of metal salts, anodes and other consumables for the electro-deposition or electroplating of metal films or anodized layer formation.
Finishing and surface treatment services pretreat or finish the surfaces of manufactured components to meet roughness or surface condition requirements.
Specialty coating and finishing services perform specialized or proprietary coating and finishing processes.
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Product Announcements
Sulfuric anodize, commonly referred to as Type II anodizing, is formed by using an electrolytic solution of sulfuric acid at room temperature. Hardcoat anodize, commonly referred to as Type III... (read more)
IHC, Inc. - Sulfuric Anodizing Services
Sulfuric anodize, commonly referred to as Type II anodizing, is formed by using an electrolytic solution of sulfuric acid at room temperature and a current density of 15 to 22 Amps per square foot. (read more)
IHC, Inc. - Chromic Anodizing Services
Chromic anodize, like the Type I and Type II coatings, offers a minimum of 336 hours 5% salt spray resistance per ASTM B117. It is not as durable as Type II or Type II, and does not accept dyes as... (read more)
METALAST International, Inc. - METALAST AA-200 (Aluminum Anodizing Additive)
METALAST AA-200 is a proprietary aluminum anodizing, specialty chemical additive. AA-200 is a combination of organic monomers specially formulated to provide a better quality and more versatile oxide. (read more)
Cannon Water Technology Inc. - Corrosion Monitoring
Let Cannon Water Technology Inc. build your next corrosion monitoring coupon rack!... (read more)
Aerospace Defense Coatings Of Georgia - Anodic Coatings for Aluminum and Aluminum Alloys
This specification covers the requirements for six types and two classes of electrolytically formed anodic coatings on aluminum and aluminum alloys for non-architectural applications... (read more)
IHC, Inc. - Hardcoat Anodizing
Hardcoat anodize, commonly referred to as Type III anodizing, is formed by using an electrolytic solution of sulfuric acid at approximately 32° F and a current density of 23 to 37 Amps per square... (read more)
 
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Topics of Interest
The aluminum buildup rate is an important aspect in assessing the efficiency of an anodizing process. It will determine the decant rate, and in turn will affect the anodizing costs which are related... (Read More)
The dimension of an aluminum component increases as a result of anodizing. The increase is due to the fact that the formed aluminum oxide has a greater volume than the consumed metal. It is generally... (Read More)
One of the benefits of the METALAST Technology is improved corrosion resistance. Corrosion resistance is typically measured using a salt spray procedure (ASTM B 117) where the anodized samples are... (Read More)
In previous report, the comparative studies of anodic coatings formed in the METALAST and traditional electrolytes under Type II condition (at 70 °F, 24 ASF)were made. The influence of the METALAST... (Read More)
As an effort to understand the details of the METALAST anodizing process in terms of its advantages over the traditional anodizing process and the mechanisms of anodizing under the constant current... (Read More)
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Technical Articles
Aluminum Build up Rates Under Type II Anodizing Conditions (.pdf) - Metals and Alloys
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