The adsorption of sulphur dioxide on copper specimens, both untreated and treated with benzotriazole, has been studied using radioactive SO2.
The concentration of SO2 and the relative humidity in the air have been varied in order to determine the efficiency of inhibition in various conditions. At 100% R.H. and very high levels of SO2 concentration, the inhibitor is effective in reducing the adsorption of gas on the treated specimens, as compared with the bare copper ones. Almost total oxidation of SO2 occurs for the samples treated with BTA, in all the exposure conditions examined.
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