THE INFLUENCE OF TEMPERATURE ON THE RATE OF NATURAL PENETRATION OF ELECTROLYTES INTO WOOD

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Abstract
The rates of diffusion of sodium hydroxide, sodium chloride and hydrochloric acid into chips of black spruce heartwood impregnated with water were measured for different shapes of chip at 20, 50, and 75 °C. In the longitudinal direction of the wood, hydrochloric acid diffuses the most rapidly and sodium hydroxide and sodium chloride at nearly the same rates. In the lateral direction sodium hydroxide diffuses the most rapidly, owing to its action on the wood. Concentration of electrolyte is practically without influence on the time to half-value for sodium hydroxide and hydrochloric acid. The density of the wood does not affect the rate of diffusion of sodium hydroxide.The rate of diffusion of water into air dry chips was measured at 20 and 50 °C.

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