- chromium(VI)-free passivation for aluminium
- suitable as post-treatment of anodic coatings1)
- liquid concentrate, based on trivalent chromium
- produces colourful and visible layers which are blue-grey to yellow iridescent
- excellent bare corrosion protection comparable to hexavalent passivations
- also works on high copper alloys and cast aluminium
- easy to handle for immersion, spray and wipe application
- QPL qualified
- meets or exceeds MIL-DTL-81706B and MIL-DTL-5541F for bare corrosion
(336 h in NSS per ASTM B-117, or DIN EN ISO 9227), meeting classes 1A and 3
- low contact resistance: < 5000 µOhm per square inch per MIL-DTL-81706B
- heat resistant inorganic passivation layer (see “hints”)
- applied for US-patent: 6,669,764
- IMDS-number: 511025914
Application :
For the make-up, dilute SurTec 650 V chromitAL concentrate with deionised (DI-)water.
The optimal process parameters may vary, and depend on alloys treated, plant layout, and
required performance criteria. Parameters are set accordingly in consultation with the qualified
SurTec personnel.
