Welcome to Techlines... July 2006

Cermakrome

On occasion companies have had a dull finish to the coating after polishing. One of the causes can be the water used in the vibratory polisher. It is best to use water filters to remove contaminants both particulate and chemical. Distilled water is very good and Deionized water works best. In addition it can be beneficial to use softened water. If the water used is “hard” due to lime in the water, this will have a very negative impact on polishing. A white film will exist on the polished surface. By using “soft” water in many cases, this problem can be alleviated.

Reminder: Powdr2O™

Always store P2O at temperatures below 80F, as you would with any powder coating material. Storage at temperatures above this for a significant length of time will damage the material rendering it unusable.

NEW * NEW * NEW

Chrome Free Metallic Ceramic Coating

Tech Line Coatings has developed a Hexavalent Chrome (CrO3) FREE, Aluminum Filled Metallic Ceramic Coating. The coating has been tested and meets or exceeds all of the Characteristics of our standard Cermakrome, other than Salt Spray. Salt Spray testing results will be made available when the test has been run to completion. Standard Cermakrome has passed a 6500 hour Salt Spray testing.

Initially the New Coating will be made available only for applications where the Chrome Free Technology is required. The New coating, currently identified by its developmental code DC2-1, is a 2 part system. The sample material now being made to select customers is a low VOV water emulsion. The solvent technology is still being refined and it is expected that DC2-1 will be ultimately be supplied as a “0” VOC content material.

Test parts have been exposed to EGT’s in excess of 1900F and base metal temperatures over 1300F with no delamination. Discoloring of the coating at base metal temperatures of 1200F does occur due to the aluminum content. This is normal for all Metallic Ceramic Coatings containing aluminum. The surface finish is very polishable to a bright, chrome like finish in a vibratory polisher. The surface is also as hard as, if in fact not harder, than standard Cermakrome.

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