SurTec 650 V Thick Tri-chrome Passivation for Alu


  • hexavalent chromium-free passivation for aluminium
  • suitable as post-treatment of anodic coatings
  • 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, resp. 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
  • applied for US-patent: 6,669,764

Approval and specification

  • IMDS-number: 511025914

Product Information Sheets

back to overview