Diffusion of fused borate rods in top ends of poles
D Dirol, J P Guder
Diffusion tests of fused borate rods were carried out on extremities of sapwood poles in service. Rods were set in drills under the cone with or without addition of liquid Boracol 40. After one year of weathering, a good diffusion in the slice under the cone and even below the slice and in the cone itself was observed in Scots pine and spruce poles. The rods were still intacts and constitute, in fact, a reserve of boric acid for the future. This type of treatment would be satisfactory as secondary treatments of poles in service.
Keywords: FIELD TESTS; POLE TOPS; POLES; BORACOL 40; BORON RODS; DIFFUSION; PICEA; PINUS SYLVESTRIS; MOISTURE CONTENT