Corrosion Ceramic Coated Screws
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Screws made of this material may cost twice as much as coated steel fasteners.
Corrosion ceramic coated screws. The coating offers corrosion protection comparable to hot dip galvanizing without discoloring the wood. Polymer coated steel screws nails and bolts rely on a thin zinc plating covered with a non reactive organic polymer coating to fight corrosion in copper treated wood. Please make your contractors aware prior to purchasing ceramic coated screws of the following. Also most threaded fasteners are heat treated to increase their strength but when they re subsequently hot dip galvanized the high temperature around 860 f of the molten zinc in the.
Some have an especially slippery top coat to make them easier to drive into wood. A lifetime polymer coating provides extra corrosion resistance that is guaranteed for the life of your outdoor project. Ceramic coated screws have performed extremely well in salt spray testing but this does not mean they should be substituted for stainless steel in a marine environment. The corrosion resistant coating quality is superior compared to the other screws.
Dacro is a pollution free ceramic coating for fasteners used with treated lumber. It is tested by salt spray for 1 000 hours long and the quality of the corrosion resistant bronze ceramic coat is proven. Galvanized steel screws however are plated with a corrosion resistant coating usually consisting of zinc that is not nearly as reactive with aluminum. Polymer coated screws have a few advantages over hot dip galvanized ones.
The zinc plating prevents the underlying steel from coming into contact with the aluminum and the risk of corrosion of the aluminum is reduced significantly. The polymer coating acts like a plastic wrapper to keep water and dissolved copper from reaching and reacting with the zinc and steel. Philips bugle head coarse thread sharp point polymer coated exterior screw 1 lb pack. Screws with a proper dacro coating can typically withstand a 500 hour salt spray test.
This material is the standard in marine fasteners because it resists corrosion and doesn t promote rot in the wood around the fastener.
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