Category Archives: Newsletters
Ask Jack: Mixed Alloys
Dear Jack, Why is it so important to identify alloys and not to mix alloys before you begin hardcoat on anodizing your parts?From North Carolina, M From Jack,The results of the anodizing process are greatly influenced by the aluminum alloy being treated, so it is important for anodizer to have a basic understanding of aluminum [...]
Micralox Goes to World Congress on Aluminium, Bologna, Italy in 2011
Title: MICRO-CRYSTALLINE ANODIC COATINGS – A REVOLUTIONARY PLATFORM TECHNOLOGY IN CORROSION PROTECTION Tim Cabot, Jack Tetrault and Mike Sung Presenter: Jack Tetrault, Sanford Process Corporation; COO Duralectra-CHN, LLC Summary A basic requirement for finishing aluminum is to protect the volatile untreated surface from corrosion attack. However, current solutions provide insufficient protection and therefore limit the [...]
2010 D-CHN Quality Audits
D-CHN has been ISO 9001:2008 certified since 2007. Since then we have invested generous amounts of time and effort to improve our quality system. Many of our customers and potential customers, under increasing pressure to find finishers with certified quality systems, decided to audit us to investigate our system in terms of documentation and [...]
Anodizing Issues with Aluminum Castings
A recent correspondence from a customer inquired about difficulties that they were having with the hard anodizing of a cast product. The product was receiving a black hard coat anodized coating and they were experiencing several problems with all the vendors they had chosen. First, the product needed to be a very dark black color [...]
Electrolytic Coloring of Hard Anodized Aluminum Alloys
By Leonid Lerner INTRODUCTION The electrolytic coloring (“two-step”) process was first in use in Europe and Asia during the 1960’s (Asada Process), and was introduced in the USA during the 1970’s by ALCAN. The earliest claim to coloring anodized aluminum belongs to Italian scientist Dr. V. Caboni. Dr. Caboni received an Italian patent in 1936 [...]
MICRALOX Accelerated Corrosion Testing Update: (1) 336 Hours of Salt Spray Test per Mil-A-8625F
MICRALOX has been tested salt spray corrosion resistance per Mil-A-8625 F. Per Mil-A-8625F, test specimens, prepared using 3 by 10 inches panels having thickness of 0.063 inches, subjected to a 5 percent salt spray test in accordance with ASTM B 117. After exposure of 336 hours, specimen is visually examined to determined that all of [...]
Tech Note: Hard Coat and Surface Roughness on 2024 Alloy
The Problem: A customer was trying to finish a 2024 aluminum enclosure that was tube-shaped but closed at one end, much like a large test tube. The part was about 24” long and had an I.D. of 2”. The outside needed to be finished with a conventional Type II anodize while the ID needed a [...]
