Surtec 650 Surtec 650V
SurTec 650V is a hexavalent chromium free passivation for aluminium, suitable for alloyed and casted aluminum. It is also used as a pre-treatment before lacquering, powder coating and gluing. It is easy to handle in immersion, spray and wipe application and produces an iridescent, faintly blue to tan and visible layer. It has excellent bare corrosion protection comparable to hexavalent passivation.

Approved by Qualicoat it meets or exceeds MIL-DTL-81706B and MIL-DTL-5541F for bare corrosion (336 h in neutral salt Spray per ASTM B-117, respectively, DIN EN ISO 9227). Electrically it has a low contact resistance: < 5000 μOhm per square inch per MIL-DTL-81706B.

Processes conform to but not limited to:

• MBDA Missile Systems BMS 1999 Rev 4
• Zodiac Aerospace EPS 2018