Type I versus Type II anodizing.(ALUMINUM ANODIZING CLINIC) From: Products Finishing | Date: May 1, 2008| Author: Chesterfield, Larry | COPYRIGHT 2008 Gardner Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

Q. I operate a small sulfuric acid anodizing line and have a question about chromic acid (Type I) anodizing. When discussing the advantages of Type I anodizing, some say it's better suited for difficult-to-rinse parts because of the less aggressive attack of chromic acid compared to sulfuric acid on the part. But I always thought hex chrome was a highly corrosive oxidizer, even though chromic acid is a weaker acid than sulfuric. Maybe the hex chrome has a minimal effect on the alum...