IRG/COIPM INTERNATIONAL MARINE TEST - to determine the effect of timber substrate on the effectiveness of water-borne salt preservatives in sea-water. Progress Report 20: Report on the inspection of specimens at Sekondi, Ghana after 48 months

IRG/WP 4116

F F K Ampong, N Asare-Nyadu

The results of the second inspection of CCA- and CCB-treated test panels exposed at Sekondi, Ghana, in June 1980, are presented. The panels of Pinus sylvestris treated with 3% CCA are stil unattacked after 48 months. Panels treated with 10% CCA and still in test (Fagus sylvatica, Pinus sylvestris and Alstonia scholaris) are still free of attack. Locol species treated with 3% CCB have all been destroyed. Of the panels treated with 10% CCB recovered from the bottom of the sea, those of Ongokea gore were shown by X-radiography to be in various stages of attack by teredinids. One recovered panel of Erythrophleum guineense and four of Mitragyna stipulosa remain free of attack. Teredinids constitute the major hazard.


Keywords: IRG/COIPM MARINE TEST; GHANA; SEKONDI; CCA; CCB; HARDWOODS; MARINE BORERS; TEREDINIDS; PHOLADS; SALINITY; X-RAY ANALYSIS; FOULING

Conference: 85-05-12/17 Guaruj√°, Brazil


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