aseanzip_boss · 1 hour agoHazy-Chrome 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 |
|---|---|---|---|
| Milky haze, wipes off | Rinse contamination / bath oil | White wipe cloth test | Skim + check rinse overflow |
| Gray haze, will not wipe | Low bath temperature or CrO3 drift | Thermometer + Ba titration | Hold 50–60 °C; correct ratio 100:1 |
| Haze in recesses only | Throwing power limit | Position map of parts | Aux anode or reduce load width |
| Iridescent yellow-blue | Catalyst ratio off ( sulfate ) | Hull cell panel | Adjust sulfate 0.8–1.2% of CrO3 |
| Haze after nickel, not on nickel | Nickel passivated before chrome | Timing check transfer | Cut transfer time; re-activate |
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: chromic acid mist is a carcinogen and burns skin. Mist suppressants, local exhaust and face shield are mandatory.
Full version — fixes with parameter windows, FAQ and case study:
Hazy-Chrome: How to Diagnose and Fix It Right | QLQ Guide