Surtec 650

    SurTec 650 chromium-free aluminium conversion coatings

    SurTec 650 chromium-free aluminium conversion coatings


    SurTec 650 is a chromium-free passivation for aluminium. It is primarily used in the electronics, automotive and aerospace industries. Surtec 650 is a high-value chemical product and process for industrial cleaning. It is either used as pre-treatment, finishing or post-treatment in the electroplating industry…

    SurTec 650 Properties

    • hexavalent chromium free passivation for aluminium
    • suitable as post-treatment of anodic coatings
    • suitable as conversion coating of magnesium
    • liquid concentrate, based on trivalent chromium
    • excellent bare corrosion protection comparable to hexavalent passivations
    • also works on alloyed and casted aluminium
    • suitable as pretreatment before lacquering, powder coating and gluing and
    • approved by GSB and QUALICOAT
    • easy to handle in immersion, spray and wipe applicationproduces an iridescent, faintly blue to tan and visible layer
    • meets or exceeds MIL-DTL-81706B and MIL-DTL-5541F for bare corrosion (336 h in NSS per ASTM B-117, respectively, DIN EN ISO 9227)
    • low contact resistance: < 5000 μOhm per square inch per MIL-DTL-81706B
    • heat resistant inorganic passivation layer (see “hints”)
    • applied for US-patent: 6,375,726; 6,511,532; 6,521,029; 6,527,841
    • IMDS-number: 30429267

    More information about SURTEC 650…

    If you are after chromium-free passivation for aluminium using SurTec 650, please get in touch with our friendly and professional team on 0191 438 6612.

    SALT test technical data sheet