Phosphorus has long been recognized as the controlling factor in plant and algae growth for many lakes and streams. A minor increase in phosphorous can cause substantial increases in both aquatic plant and algae growth. Phosphorus bearing compounds in industrial cooling and boiler water treatment programs have been common since they replaced chromate in the early 70’s. Stringent discharge limitations for phosphorus are being put in place to limit its discharge to surface waters. Typical alkaline all organic cooling water programs can have phosphorus levels from 0.3-2.5 ppm as P while limitations for discharge are being set as low as at 0.075 ppm.A new technology has been developed that provides improved corrosion protection and is non-phosphorus. This technology has been implemented in several locations including a university, a medical device manufacturer and several industrial plants. Corrosion rates were monitored using corrators and corrosion coupons. Case studies showing the corrosion coupon results are presented.
Michael Carroll, US Water ServicesJim Lukanich, US Water Services
24 Lyman Street, Suite 230
Westborough, MA 01581 USA
Phone +1 (508) 366-9339
Fax +1 (508) 366-0019
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