The Effect of Post-Steaming on Copper Naphthenate-Treated Southern Pine


  • D. Pascal Kamdem
  • Jun Zhang
  • Mike H. Freeman


XPS, XRD, ESEM-EDXA, copper naphthenate, cuprous oxide, steam, wood preservatives, southern yellow pine


The reduction of copper from cupric (Cu2+) to cuprous (Cu1+) form in post-steamed copper naphthe-nate-treated southern pine was monitored. The amount of cuprous oxide formed after the post-steam treatment was determined by X-ray diffraction (XRD). About 50% of copper was reduced from cupric to cuprous in post-steamed samples treated to a retention of 0.31 to 0.51% total copper. Less than 15% of the copper was reduced to cuprous in the post-steamed samples containing 0.71% total copper. Environmental scanning electron microscopy (ESEM) was used to collect images of the crystalline cuprous oxide deposits on the wood cell walls.


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