Using a silicate containing degreasing, the surface has to be treated with a fluoride containing deoxidising subsequently. The test kit and its instructions can be ordered separately. After the passivation with surtec 650, the parts have to be rinsed. They were then immersed in naturallyaerated surtec 650 solution 1. Trivalent chromium conversion coating formation on aluminium. Surtec 650 concentrate, which does not impair the quality and the function of the product.
For more information download our chromating info sheet or contact us for a quote. For successive lacquering, the last rinse must have a conductivity of less than 30 scm. To fundamentally understand the layer formation process and the composition of the. Analysis by photometry can be requested separately but it is less exact. The safety instructions and the instructions for environmental protection have to be followed in. Fill surtec 650 chromital concentrate into the tank and dilute it. During the first days of storage, the phvalue of the product increases. Chromate conversion coatings quality service mp eastern. Surtec 650 chromital is used for new makeup surtec 650 b chromital is used for replenishment makeup value. Surtec 650 is suitable for alloyed and casted aluminium and pretreatment before laquering, powder coating and gluing. Prior to the passivation with surtec 650, the aluminium surface must be cleaned and deoxidised thoroughly. Surtec 650 trichrome passivation of aluminum pdf free.
We offer alocrom, alocrom 1200, surtec 650 tcp and irridite ncp. Firefighters should wear appropriate protective equipment and self. No action shall be taken involving any personal risk or without suitable training. Pdf trivalent chromium conversion coating formation on aluminium. Optimally usable for the electronics industry due to low surface resistance 336 h nss. For best corrosion resistance, rinsing with deionised water is recommended. All the three oxide free alloy samples were treated at various immersion times such as 60, 120, 300 and 600 secs at 40. Surtec 650 tcp is a trivalent chromate, the coating is clear to colourless and is. Description surtec 650 is a rohs, reach compliant and qpl approved liquid chemical used to form a protective conversion coating on aluminum surfaces without the use of hexavalent chromium. Surtec 650 chromital and revealed twolayers, comprising an inner aluminiumrich layer and an outer chromium and.
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