-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
on this site
current topics
topic 0629

How to anodize high copper, high silicon aluminum


Currently involved in anodizing high Cu (1-1.5%) and Si (12.5-13%) aluminum. Would like information on effect of these parameters on anodized layer thickness, uniformity, and hardness. Any info out there on process parameters (voltage, amperage, electrolyte temp, exposure time, acid concentrations, electrolyte makeup) pertaining to this type of alloy ?

Appreciate all the help I can get!

Rex Harper

probert book
Aluminum How-To

by Robert Probert
$89 New
The Chromating - Anodizing - Hardcoating Handbook

Surface Treatment & Finishing of Aluminium and Its Alloys
Wernick, Pinner & Sheasby
from Abe Books



Copper and Silicon interfere with the anodizing process. High conductivity alloying elements, such as copper, tend to pull power away from the process, providing sites to initiate the "burning" phenomenon. Low conductivity elements, such as silicon, act as roadblocks to the formation of the anodic film. The concentration, distribution, and form of these alloying elements have a dramatic effect on the coating thickness, uniformity, and hardness. Many of these limitations can be overcome with the unique hardcoating process LukonDC. Contrary to the conventional wisdom, hard, thick coatings of up to 75 um are possible and are being produced every day. We will be glad to hardcoat prototypes for evaluation, free of charge.

Chris Jurey, Past-President IHAA
Luke Engineering & Mfg. Co. Inc.
supporting advertiser
Wadsworth, Ohio

luke engineering banner

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.