Duration of Exposure (Part 3): Plumbing and Construction Materials
Publication: Forensic Engineering 2022
ABSTRACT
This study advances our understanding of metal corrosion rates among 21 common building, plumbing and electrical components by comparing their qualitative responses to four exposure scenarios: control conditions (24°C and 50% RH), elevated humidity (>95% RH), freshwater mist, and saltwater mist (seawater @ 35 ppt) over periods ranging from 11 to 18-months. The entire study was conducted over a nine-year period. Changes in surface appearance varied among the components due to their elemental composition. The final study documented changes to galvanized steel pieces (i.e., garbage disposal bracket, electrical outlet cover, electrical junction box, flexible electrical conduit, and electrical conduit strap), steel pieces (i.e., sink fastener and face-mounted hinge), and one brass piece (SharkBite angle stop valve). The elemental composition revealed that the most corrosion resistance over the entire study was among nickel, stainless steel, and galvanized steel components. The least resistance was exhibited among those with a predominance of iron. The study concluded that careful examination of these components could provide insight into the duration of a water loss.
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Forensic Engineering 2022
Pages: 1152 - 1161
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Published online: Nov 2, 2022
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