Anodizing With One Universal Electrolyte Using Pulse-Step-Ramp and Run Procedures

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Anodizing guru Fred Schaedel shares some of his trade secrets.

Over the years, numerous problem-solving situations and major environmental considerations have necessitated the development of chrome-free mixed electrolytes. When used in conjunction with modified pulse - step - ramp procedures, these mixed electrolytes are able to meet more demanding Type IC, II, and III anodize requirements.

There are some concentrated additives and/or modifiers available along with specific organic acids which improve the sulfuric acid electrolyte. Many facilities are now using mixed electrolytes and/or stronger additives, because in production problem-solving situations their performance characteristics are far superior to conventional sulfuric acid-only baths.

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