DGR Industrial Products, Inc. :: Specialty Coatings :: Conversion Coatings :: Alodine Chromate Conversion For Aluminum Alloys :: Aluminate Gold Chromate Conversion Coating

Price:

$26.95

Chemical Name:

Aluminate® Gold Conversion Coating

Synonyms:

Chromate Conversion Coating

Detailed Product Description:

Aluminate® Gold, a registered trademark of DGR Industrial Products, is a chemical

treatment process for aluminum used to provide corrosion protection and as a surface

preparation for paint and adhesives. Sometimes called “aluminum passivation,” it

contains hexavalent chromium and is intended to provide corrosion prevention even

when left unpainted.

Chromate conversion is an excellent treatment method to prep aluminum prior to paint

or adhesives since it greatly enhances the ability of an organic coating to form a bond

with the aluminum substrate. Being a surface conversion treatment rather than a coating,

it will not alter the dimensions of the part.

It is frequently used on electrical and electronic equipment because it provides increased

corrosion resistance while remaining electrically conductive.

The Aluminate® Gold process produces a microscopic thin film commonly prescribed on aluminum

to provide the following surface characteristics:

Specification & Certifications:

Aluminate® Gold methods and properties are defined by MIL-DTL-5541-F (formerly MIL-C-5541F) now AMS-C-5541 and AMS-A-2473.

Application Notes:

The best results are achieved on wrought alloys (machined billet aluminum alloys).

Good results can also be achieved on type 356 aluminum castings. Type 380 die

casting alloys do not alodine well, however. It should also be noted that the

chemical film is fragile immediately after processing and a 24-hour waiting time

before handling the parts is preferable.

Applications in which temperatures can reach over 120ºF can break down the corrosion resistance

of the coating. In comparison to anodizing, this chemical film is more fragile and

not generally recommended for high-use areas.

This is a visible coating that leaves the surface with a golden coloration.

Surface Preparation:

Aluminum surfaces must be cleaned with a suitable etchant such as Aluminate® Deox A

or Aluminate® Deox B, followed by a water rinse.

Immersion Process:

To formulate bath, mix 33 parts Aluminate® Gold solution with 67 parts of water. Immersion

time is 2 to 5 minutes. Application temperature can range from ambient up to 100ºF.

Rinse part thoroughly with water and allow to dry. Surface is ready for paint.

Brush-On Process:

Aluminate® Gold solution may be applied by brush or sponge, by using undiluted directly from

container. Assure surface remains fully wet during required contact time of 2 to 5 minutes.

Rinse part with water and surface is ready for paint. 1 quart treats about 100 sq. ft.