Dacromet-type and zinc flake coated fasteners are often chosen for corrosion resistance, especially where buyers want better protection than ordinary zinc plating. But the coating can still be damaged by poor packing.<\/p>\n\n\n\n
This is a common frustration. The parts pass coating inspection, then arrive with rubbed heads, chipped edges, stained surfaces, or mixed lots. The coating process was not always the problem. The packaging was.<\/p>\n\n\n\n
Zinc flake coatings are usually applied as thin, layered protective films. They may include base coat, topcoat, lubricant, or sealant depending on the specification. These coatings help corrosion performance, but they are not designed to survive rough bulk handling without control.<\/p>\n\n\n\n
Pour les acheteurs qui examinent attaches enduites<\/a>, packaging should be part of the RFQ, not a final warehouse decision.<\/p>\n\n\n\n Many buyers still say \u201cDacromet\u201d when they mean zinc flake coating. Dacromet is commonly used in the market as a familiar term, but the exact coating system should be confirmed.<\/p>\n\n\n\n State clearly:<\/p>\n\n\n\n For standard bolts, nuts, screws, and washers, attaches standards<\/a> may be supplied with zinc flake coating when the specification allows it.<\/p>\n\n\n\n This is often safer than loose bulk packing. The bag quantity should be easy to count and easy to lift. For small screws, 500 pcs or 1,000 pcs per bag may work. For large bolts, much smaller quantities are better.<\/p>\n\n\n\n For larger bolts, use layers, liners, or partitions when the coated surface is sensitive. This reduces rubbing during ocean freight and inland trucking.<\/p>\n\n\n\n Fasteners are heavy. Pallets should be strong, wrapped properly, and not overloaded. Cartons should not be crushed under upper layers.<\/p>\n\n\n\n Threads need protection because coating damage here can affect assembly and corrosion resistance. Zinc flake coated parts may also include a lubricated topcoat. If parts rub heavily during transport, torque behavior can become less consistent.<\/p>\n\n\n\n Buyers should request:<\/p>\n\n\n\nPackaging Risk<\/th> R\u00e9sultat possible<\/th> Pr\u00e9vention<\/th><\/tr><\/thead> Heavy bulk packing<\/td> Coating abrasion and chipped corners<\/td> Limit carton weight and use inner bags<\/td><\/tr> Loose metal-to-metal contact<\/td> Rub marks on heads and threads<\/td> Use smaller units or separators<\/td><\/tr> Moisture in cartons<\/td> Staining, white marks, corrosion risk<\/td> Use dry cartons, liners, and desiccants<\/td><\/tr> Tailles mixtes<\/td> Wrong assembly and shortage claims<\/td> Separate by size, lot, and item code<\/td><\/tr> Cartons faibles<\/td> Broken packaging during transit<\/td> Use export-grade cartons and pallets<\/td><\/tr> Mauvais \u00e9tiquetage<\/td> Perte de tra\u00e7abilit\u00e9<\/td> Include coating batch and lot number<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n Confirm the Coating Before Designing Packaging<\/h2>\n\n\n\n
Dacromet vs Zinc Flake<\/h3>\n\n\n\n
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Packing Method Selection<\/h2>\n\n\n\n
Small Bags Inside Cartons<\/h3>\n\n\n\n
Layered Carton Packing<\/h3>\n\n\n\n
Pallet Control<\/h3>\n\n\n\n
Special Attention for Threads<\/h2>\n\n\n\n
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