STUDIES ON ARSENICAL CREOSOTE AS A WOOD PRESERVATIVE FOR MARINE STRUCTURE- PART II-OBSERVATION ON LEACHING CORROSIN AND RESISTANCE TO BORER ATTACK

Abstract

A detailed study on arsenical creosote with reference to
leaching, corrosion and anti-borer p-roperties was carried out,
Results showed that aging had vety little effect on the preservative
which suggested better fixation of the preservative into the wood.
Corrosion of mild steel, galvanised iron, aluminium-magnesium
alloy (M57S) and copper panels in the preservative was found to
be negligible, Normal creosote and low temperatme creosote of
Regional Research Laboratory, Hyderctbad, both fortified with
arsenic trio:xjde resisted borer damage on wooden pands for a
period of over five months in the port of Cochin. The perfor-mance
of low temperature creos.ote fortified with arsenic was found
to be equally satisfactory when compared to normal creosote for-tified
in the same manneL A loading of 208.6 Kgsjml> for Haldtt
(Adina cordifolia) and 138 Kgsjm'§ for Mango (lvfangifera indica)
in the case of normal creosote and 177 Kgs/m :e. for Mango the
case of RRL creosote were found to be su.fficient for treating
the wood.