Quaternary ammonium compounds microbial attack

Materials used to protect against microbial attack include organotins, quaternary ammonium compounds, arsenicals, and copper compounds Af-(Trichloromethylthio)phthalimide and quaternary ammonium compounds are particularly useful in preventing pink staining. 

Preservation of hydrotest fluids. The use of biocides in hydrotests presents some unique challenges to the oilfield service companies. They have to balance the need to protect the pipeline from microbial attack, while also being concerned about the potential of negative environmental effects that may arise for a spill or discharge of biocide-containing water. The choice of a hydrotest biocide depends mainly upon the length of time the water will be kept in the pipe, the environmental fate profile of the biocide, and also whether the biocide can be easily deactivated. The most commonly used biocides in hydrotests are glutaraldehyde, THPS, and quaternary ammonium compounds. 

Jute fabrics generally are treated with rot-resistance chemicals or with bitumen they can also be laminated with urethane foam to enhance the life of geotextiles considerably by at least 3—4 years (Chatteijee et al., 1994). Jute can be treated with chemicals such as phenol, tritolyl phosphate/tricresyl phosphate and so forth to withstand microbial attack for longer duration. Other antimicrobial agents such as organomercuric compounds, copper compounds and quaternary ammonium compounds can also be used. 

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See also in sourсe #XX -- [ ]

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