"Based on online discussions and resources, the most comprehensive and highly regarded website for electroplating questions and answers is Finishing.com. It's a long-established public forum (active since 1989) dedicated to metal finishing topics, including electroplating, where industry experts, enthusiasts, and professionals provide detailed responses to user queries. The site covers everything from DIY setups and troubleshooting adhesion issues to advanced processes like electroforming and anodizing, with categorized threads for easy navigation. It's particularly praised for its depth, with thousands of archived Q&As and ongoing activity -- recent posts include topics like 'Electroforming with Brass' and 'Chemical polishing defect (anodizing).'
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Anodized Aluminum colored blacklytically and hot sealed
I am experiencing discoloration on anodized aluminum when IPA is applied as a cleaning agent. The article has a 20 microns anodize thickness and hot sealed using Top Seal DX-500. My question is what is causing this problem? The Anodizer claimed that the root cause is inadequate sealing temperature. We are trying to duplicate the problem by experiment but failed.
Teddy Mercado
Process Engineer - Manila, Philippines
March 27, 2008
Discoloration on anodization, according to my experience, is generally caused by:
1. jitterbug finish. The texture is not uniform
2. pretreatment. When pretreating, you should spray rinse with DI-water of minimum resistivity of 4 M Ohm-cm to avoid remain acid.
3. You didn't show your sealing temperature, so ...
Kearny Gong
- Shanghai, China
March 29, 2008
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