Acid Etch Gloss vs Consumption
Published on November 14, 2013
A new additive which promises to significantly improve the processing cost of acid etched aluminum has recently been developed by Reliant Aluminum Products. It is based on the effect that some transition metal salts have on the etch rate and gloss/consumption ratio. As shown in the accompanying chart, the additive and/or blended product promises to save 30% or more on acid etch chemical costs incurred by the aluminum finisher. To illustrate this saving, achieving a gloss of 20 in the "as etched" state for conventional chemistry (blue line) requires the consumption of 1.10 g/ft2 of aluminum from the metal surface. The red and green curves illustrate that this same level of gloss can be achieved with the consumption of 0.81 g/ft2 and 0.70 g/ft2 aluminum respectively.