aseanzip_boss · 1 hour agoChrome Burning And Poor Coverage is one of the recurring questions on finishing forums — and most first answers jump to a single fix. There isn’t one: the symptom has several causes, each confirmed differently.
Triage: symptom → confirm → first move
| Symptom | Likely root | Confirm by | First move |
|---|---|---|---|
| Burnt, gray nodules on edges/high points | Local CD far above window | Position map vs rack layout | Cut total amps; add thieves |
| Bare spots in recesses while edges burn | Throwing power ceiling | Coverage vs position chart | Aux anode trial on recess |
| Burns after bath cools overnight | Temperature-CD coupling | Temp + amps log overlay | Interlock heat to line start |
| Burns only on new racks | Contact resistance low, current hogging | Contact check by rack age | Balance load across racks |
| Coverage loss with normal burn | Catalyst ratio drift | Hull cell + titration | Correct sulfate ratio 100:1 |
The routine
- Photograph the part before touching it — the pattern is evidence
- Confirm by the column: don’t treat before you know
- Run one corrective action only; verify before the next
- Log everything on the tank card
Safety: Safety: chromic acid mist is a carcinogen and burns skin. Exhaust running before load-in, face shield, and immediate first aid for any chrome burn.
Full version — fixes with parameter windows, FAQ and case study:
Chrome Burning And Poor Coverage: How to Diagnose and Fix It Right | Q