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  Paper Details                 Browse papers by sector
White Rust
Author            :Association of Water Technologies
Designation    :Association
Company        :Association of Water Technologies
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Synopsis
The on-going occurrence of white rust corrosion of Cooling towers led the AWT Technical Committee to conduct a survey amongst the AWT membership to assess the magnitude of concern for white rust corrosion.
A brief overview of the survey results identified that white rust corrosion occurs predominantly with newly constructed / installed galvanized steel towers and related cooling components. The predominant chemistry parameter known to aggravate white rust is high alkalinity/high pH, and is further aggravated by low hardness (softened water). It was found that water treatment professionals have various methods of prevention, but that these methods were not always successful when alkalinity/pH and hardness levels were not maintained within the prescribed ranges.The conclusions offered were, firstly, that white rust is a prevalent problem and, secondly, the AWT organization should prepare a topic update and guidelines to increase awareness and promote prevention of white rust corrosion of galvanized steel cooling components.

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