​Anodizing Technologies Inc.

 

 

Alkaline etching

• Keeping a “No Dump” Etch in Balance

• Alkaline Etching

Anodic Coatings as a Base for Paint and Adhesion

• Clear Anodize as a Paint Base

• Glue Adherence to Black Anodize

Anodic Substrate

• Anodic Coating on Rough vs. Smooth Substrate

Anodizing Castings and Die Castings

• Corrosion on Die Cast Parts

• Black Anodize on 383 Alloy

• More on Anodizing Die-Cast Aluminum Alloys

• Anodizing Die Cast Aluminum Alloys

• Black Powder on Die Casting After Anodizing

• Hardcoat Anodize on Diecast Alloy

• Corrosion on Die Cast Parts

• Blue Anodize for Die-Castings

Anodizing Cookware

• Anodized Aluminum Cookware

• Food-Grade Anodic Coatings

Anodizing Specifications

• What is the Correct Anodizing Specification?

Anodizing, Brush and Touch-up

• “Touch-up” For Scratches On Clear Anodized Parts

Anodizing, Current Density vs. Voltage Method

• Anodizing: Current Density vs. Voltage

• CALCULATING ANODIZING RATE FOR TYPE II AND TYPE III COATINGS

• Current Density Revisited

Anodizing, Hardcoat

• Hardcoat Anodizing

• Parts Burning During Hard Anodizing

• Hardness of Hardcoat Anodize

• Hardcoat Anodizing

• Hardcoating Mixed Tempers

• Hardcoat Anodize Thickness Problem

• Hardcoat Anodizing Controls

• Hardcoat Coating thickness Consistency and Uniformity

• Hardcoat Anodize on Diecast Alloy

• Producing a Thick Anodic Coating on 6061-T6

• Color Variation of Hardcoat Anodized Cylinders

• Hard Anodize Chipping/Corroding

• Anodizing Q&A: Parts Burning During Hard Anodizing

Anodizing, Type I (chromic acid)

• More on Type I vs. Type II Anodizing

• Chromic Acid Anodize Failing Salt Spray Testing

• TYPE I VERSUS TYPE II ANODIZING

Anodizing, Type II & Variations

• Type IIB Anodize

• More on Type I vs. Type II Anodizing

• Oxalic Acid Anodizing—the Basics

• TYPE I VERSUS TYPE II ANODIZING

• Anodized Aluminum Building Facade

• Controlling Dissolved Aluminum in the Type II and Type III Anodizing Bath

• Dual Purpose Anodizing Bath

Bath titration and Control

• Titrating Sulfuric Acid Anodizing Baths

Blistering of the Anodic Coating

• More About Blistering

• Blistering of Anodic Coating on 7075 Alloy

• Pitting on 7000 Series Al Alloy

Boric – Sulfuric Anodizing

• Pink Coating on BSA Parts

Brightening

• Bright Anodized parts Don't Pass the Cass Test

Cleaning, Desmutting and Pre-treatment

• Change in Aqueous Cleaning Process

• “Water-Break-Free” Test

• Smut and Desmutting

• Pretreatment of Aluminum for Powder Coating

Coloring and Dying

• White Spots on Anodized Parts Dyed Black

• Color Uniformity

• Consistent Black Color

• Anodized and Dyed Black Extrusions Turning Green and Purple

• Problems with Black-Dyed Parts

• Processing Conditions for Anodized and Black Dyed parts

• When Black Dye is Not Black

• What are the Properties of Black Anodized Finishes?

• Dying Anodized Parts With Small Holes

• Blue Anodize for Die-Castings

• Electrolytic Coloring and Corrosion Resistance

• Interference Coloring

Conversion Coatings

• Chem Film Over A Black Anodized Coating

• Chemical Film Staining

• Etching Prior to Chromate Conversion Coatings

• Chromate Conversion Coatings

DI Water

• DI Water Quality

• ONGOING DISCUSSION OF DI WATER QUALITY

Laser Marking or “Etching”

• Protection from Laser Marking on Aerospace Parts

• Laser Engraving Anodized Aluminum

Masking

• Masking Techniques

Miscellaneous

• Ink Printing on Anodized Aluminum

• Scrap Allowance

• Surface Roughness Before and After Anodizing

• Salts Build-up Around The Top of The Cathodes

• Anodizing “Aluminized” Steel

• Welded Aluminum Railing

• Best Surface Finish for Anodizing

• Critical Holes Out of Tolerance

• Unanodized Aluminum Mixing Bowl Wear

• Removing Welding Smut from Aluminum

• Rough Surface Finish after Anodizing

Rinsing

• Rinsing Parts with Entrapped Chemical Residue

• Rinsing Blind Holes Prior to Dying

• Rinsing Parts with Entrapped Chemical Residue

Rule of 720 or 312 (metric)

• CALCULATING ANODIZING RATE FOR TYPE II AND TYPE III COATINGS

Sealing

• Dichromate Sealing Problems

• The Problem of Sealing Smut

• Sealing Parts After Two Months

• Dichromate Seal Contaminants

• Dichromate Sealing and Fatigue Life

• Duplex Sealing With Nickel Acetate and Di Water

• Sulfate/Chloride Contamination

• Checking Quality of Seal

• "Bleach Test" for Quality of Anodic Seal

• Selective Smut On Sealed Parts

Stripping

• Rough, Uneven Surface After Stripping

• Stripping Hard Anodic Coatings

• Stripping the Anodic Coating

Teflon “Impregnation”

• Teflon Impregnation and Wear

• Teflon Impregnated Anodizing

Testing of Anodic Coatings

• ASTM Test Comparison

• Chromic Acid Anodize Failing Salt Spray Testing

• Checking Quality of Seal

• "Bleach Test" for Quality of Anodic Seal

• Bright Anodized parts Don't Pass the Cass Test

• Chromic Acid Anodizing and Salt Spray Testing

• "Bleach Test" Feedback

Troubleshooting

• Black, Pitted Areas on Anodized Parts

• Is it Anodized or Not?

• That Sticky Feeling

• Dark Gray Spots in Clear Anodizing

• Pitting on Anodized Aluminum Handrail

• Another Variation on the Pitting Theme

• Pitting on 7000 Series Al Alloy

• Critical Holes Out of Tolerance

• "Snowflake" Corrosion on Anodized Aluminum Parts

• Pitting After Anodizing

• Solving The Air Pocket Problem

• “Chasing” The Finish

• Corrosion on Die Cast Parts

• “Cracking” of the Anodic Coating Under High Temperatures

• Cold Mill Banding Problem