Short answer: Copper resists atmosphere and water well but suffers pitting under deposits or chlorides, erosion-corrosion at high velocity and selective leaching (dezincification) in brasses; protection uses clean flow, insulation, dezincification-resistant alloys and coatings.
At a Glance
Copper’s Corrosion Profile
Copper forms a stable patina and resists most fresh water and many chemicals — see Copper Alloys Guide, Brass Grades Guide, Phosphor Bronze Guide e Copper Brass Bronze Guide. Pits start under deposits or where flow stagnates.
The Dangerous Modes
High velocity drives Erosion Corrosion Guide; coupling to steel/aluminium drives Galvanic Corrosion Guide; brasses lose zinc via Metal Dezincification Guide. Plumbing context in Copper Pipe Vs Steel Pipe e Copper Tube Supplier.
Protecting Copper
Keep flow in range, insulate dissimilar metals, specify DZR/admiralty brass, add Metal Corrosion Inhibitor Guide and document per Mill Test Certificate Guide. HXSCO supplies corrosion-rated copper and brass for your duty.
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Perguntas frequentes
Yes — it resists atmosphere and many waters, forming a stable protective patina.
Local attack under deposits, low flow or chloride exposure breaks the film in spots.
Selective leaching of zinc from brass, leaving weak porous copper — avoided with DZR alloys.
Insulate it from more noble metals and avoid conductive bridging in the joint.
HXSCO supplies copper and DZR brass rated for plumbing, marine and industrial duty.
Source Corrosion-Rated Copper from HXSCO
HXSCO supplies copper and DZR brass rated for plumbing, marine and industrial duty. Send your alloy and quantity for a quote.