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7 W ■ TEC ® SURFACE PROTECTION WÜRTH SURFACE SYSTEMS from M2 min 3 from M4 min 5 from M10 min 8 from M2 min 3 from M4 min 5 from M10 min 8 from M2 min 3 from M4 min 5 from M10 min 8 Designation Breakdown of Würth Surface Systems Nominal size Reference coating thickness µm 1 ZSML Z S M L Zinc Zinc plated Silver Glossy silver colour 5 Medium Medium corrosion protection Lubricated ZNSHL ZN Zinc nickel Galvanic zinc nickel coating S Silver Glossy silver colour H High High corrosion protection L Lubricated ZNBHL ZN Zinc nickel Galvanic zinc nickel coating B Black Glossy black colour H High High corrosion protection L Lubricated ZFSHL ZF Zinc flake from M6 min 5 S Silver Matte silver colour H High High corrosion protection from M10 min 8 L Lubricated ZFBHL ZF Zinc flake from M6 min 5 B Black Matte black colour H High High corrosion protection from M10 min 8 L Lubricated Technical properties 1 Reference coating thicknesses The result of the corrosion test is decisive for the assumed value 2 WR Coating corrosion white rust RR Base metal corrosion red rust 3 The range of the coefficient of friction is adjusted by additionally applied lubricants or lubricants integrated in the sealing systems The friction coefficient window was determined under laboratory conditions according to DIN EN ISO 16047 and can slightly vary for individual applications