Compared to unsealed coatings, sealed coatings provide the following advantages: - Increased corrosion resistance (delays zinc corrosion and base metal corrosion with no change in the zinc coating thickness) - Change in the sliding properties (reduces the coefficients of friction and related spread for joining elements) - Coloring (distinctly ...

zinc alloy coatings" in VW 13750, electrolytically deposited zinc coatings are used for high-strength steel parts with an ultimate tensile strength Rm > 1 000 MPa, the galvanizing process must be

Jul 9, 2024 · Surface protection type Ofl-c340 must be used Surface protection type Ofl-c340 must be used preferentiallpreferentially for weld y for weld studs, weld screws, weldedstuds, weld screws, welded pins, and weld nuts. pins, and weld nuts. 1Group Standard Group Standard TL 217 TL 217 Issue 2009-08 Issue 2009-08 Class..

The document outlines surface protection requirements for zinc coatings applied to batch-galvanized steel components. It specifies various zinc coating types, describes basic requirements and tests, and provides details on coating …

For bolts with metric ISO thread, the use of such coatings is limited to tensile strength values of up to 1200 MPa (see VW60250). Zinc electroplated or zinc alloy electroplated parts may be post-treated in passivation solutions in order to improve corrosion resistance.

This standard specifies requirements for electrolytically deposited zinc coatings on steel that do not contain Cr (VI). Coatings are not suitable for long-term use at height. Surface protection type Ofl-c340 should preferably be used for welding studs, welding screws, welded joints.

Zinc coatings with passivation layers are not suitable for use at long-term elevated temperatures > 100 °C. The use of surface protection (Ofl) type Ofl-c340 is preferred for welded parts.

Surface protection type Ofl-c340 must be used preferentially for weld studs, weld screws, welded pins, and weld nuts. 1 Group Standard TL 217 Issue 2009-08 Class. No.: 50221 Descriptors: zinc, corrosion protection, surface, coating Check standard for current issue prior to usage.

This standard defines requirements for electrolytically deposited zinc coatings on steel parts as well as for parts made from hot-dip zinc-coated semifinished product according to code letter c of VW 13750, but not for contact with Mg.

The commercial surface protection types, e.g., Ofl-c010, "commercial zinc coating," and Ofl-r010, "commercial electroplated zinc alloy coating," must not contain any Cr (VI) compounds.