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Tuesday, October 30, 2007

Wet end multiple feed points

Over the past five years, chlorine/ hypochlorite/bromine has become heavily used in the wet end at multiple feed points.

Chlorine/hypochlorite and both bromine and ammonium bromide, which are activated by chlorine, all form chloride ions.

The ions concentrate in misted areas and promote significant corrosion on metal surfaces. While halogens used as biocides are not the only source of chloride ions, they can be a significant controllable source.

Chlorine dioxide and ammonium bromide, which cause significant vapor-phase corrosion at levels higher than the other halogens, are also utilized these days as biocontrol agents.
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