73-11: Effective Phosphate/Phosphonate Treatments Replace Chromate-Based Codes and Standards

73-11: Effective Phosphate/Phosphonate Treatments Replace Chromate-Based Codes and StandardsPublic awareness of environmental standards has grown enormously in recent years. Legislation has been tailored to ban the discharge of toxic materials into streams and water ways. Such legislation has resulted in the steady de emphasis of chromate based treatments in favor of more environmentally safe programs. One that has received wide spread acceptance is a phosphate phosphonate treatment through laboratory and filed data.

This is not surprising

Ammonia in the cooling loop poses an additional challenge for Hypochlorite or oxidizing biocides in controlling the microbiological activity since monochloramines are not effective biocides

The problem has been solved with two cells concrete cooling tower in the Czech Republic where only simple maintenance was planned

Water conservation is a critical approach to environmental and resource conservation

Two case studies are reported on cooling towers in a utility and a petrochemical plant

such as PVC

The non-chemical technology was evaluated for control and prevention of corrosion

Evidence to support this contention can easily be found-­simply by comparing the gross national product with the kilowatt-hour consumption of electricity through the years

This code applies to mechanical and natural draft towers

equipment and job overhead

standards or guidelines

how to ensure all parties involved are meeting legal requirements and the responsibilities of the engineer of record