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Is My Drywall Chinese? - HB Litigation Conferences

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Copper Sulfide Wipes Off<br />

Paul G. Phillips, P.E., LEED ® AP<br />

“<strong>Chinese</strong> <strong>Drywall</strong>” Effects on<br />

Construction and Appliances<br />

COPPER SULFIDE<br />

WIPES OFF EASILY<br />

Why is this Happening?<br />

One possible process<br />

• Copper + Air => Copper Oxide protective layer<br />

“<strong>Chinese</strong> <strong>Drywall</strong>” Effects on<br />

Construction and Appliances<br />

www.rimkus.com<br />

• Hydrogen Sulfide + Copper Oxide => Copper Sulfide + Water<br />

• Copper Sulfide: Wipes off easily - Not protective<br />

• Hydrogen Sulfide: Water soluble<br />

• Reaction may continue and progress<br />

– Especially wet environments<br />

Like cooling coils!<br />

Paul G. Phillips, P.E., LEED ® AP<br />

www.rimkus.com<br />

25<br />

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