Corrosiveness of metal by copper-based preservatives

IRG/WP 06-40329

Ying Zhang, Mingliang Jiang

The corrosive rates of 4 types of metal as well as epoxy-coated metal by a variety of preservatives derived from different copper source and ingredients were conducted in this paper. The main results shown that: CCA is less corrosive to red brass and Q235A steel than other copper formulations; Copper-based preservatives such as ACQ and copper azole derived from basic cupric carbonate or cupric hydroxide are much less corrosive to Q235A steel than these from cupric sulfate; Ethanolamine is less corrosive to Q235A steel than ammonia in ACQ derived from cupric hydroxide, while other ingredients are same; Epoxy resin coating could be used for protecting red brass, Q235A steel as well as zinc hot galvanized steel from preservative corrosion.

Keywords: corrosiveness, copper, preservative

Conference: 06-06-18/22 Tromsoe, Norway

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