WSC 8800 corrosion inhibitor is used for the control of corrosion and fouling in open recirculating cooling water systems. It is best utilized in systems where the corrosion or fouling potentials are severe, or the presence of traditional heavy metal corrosion inhibitors in the plant effluent would make it unacceptable for discharge.

WSC 8800 is a carefully formulated blend of inorganic and organic, phosphorous corrosion and scale inhibitors.

WSC 8800 also contains a newly developed synthetic polymer and specific sequestering agents. Calcium carbonate scale formation, calcium phosphate sludging and iron fouling are minimized through its use.

These antifoulants greatly extend the pH range in which the product's optimum functionality is found.

WSC 8800 affords anodic and cathodic corrosion control, thus insuring the protection of a wide variety of metals. WSC 8800 does not contain chromate, zinc, borate or any other heavy metal.

Polyphosphates were one of the first chemicals used as corrosion inhibitors and later as chromate substitutes.

The exact mechanisms of polyphosphate film formation is still subject to debate. However, most authorities recognize polyphosphate as a cathodic inhibitor, which forms a durable polarizing film on the cathodic surfaces of most metals by an electrodeposition mechanism.

Theoretically, the molecule adsorbs or bonds with calcium Ions to form a colloidal particle; these positively charged particles migrate to the cathode and form a film. There are also some anodic effects because metal Ions can be included in the film.

Polyphosphate has the added benefit of being a scale inhibitor at threshold levels as low as 1-5 ppm. As an additive to potable water supplies, it stabilizes iron and eliminates "red water" problems.

HEDP and AMP phosphonate are most often used in inhibitors with the former exhibiting better chemical stability. In the presence of calcium, the phosphonates generate film formation in much the same way as polyphosphate, combining with metal cations and migrating to the cathodic surfaces of the metal.

Because this film can be easily ruptured, normal recommendations would include pretreatment at high concentrations to lay down the initial protective coating. It is believed that these substances also put down an adsorbed film on the entire surface of the metal in soft or low calcium waters.

Elevated pH levels are also desirable when using these organic inhibitors to further reduce the corrosivity of the system.

New polymers being developed, are more complex and, in certain instances, have been found superior to the simple homopolymers. An example of one such polymer is butylene maleic anhydride copolymer, which is depicted below.

This copolymer contains areas of both high and low charge density and is able to provide both crystal distortion and dispersancy. Iv is theorized that the methyl groups present impart a slightly positive charge and, consequently, the charge density at the associated maleic anhydride group is more intense allowing for better crystal distortion.

This copolymer is effective in inhibiting calcium carbonate and calcium sulfate scales. It has also proven to be fairly effective for inhibiting calcium phosphate and iron phosphate sludges and functions well as a dispersant for iron oxide

The product dosage will depend on the type of system and operational parameters.

Recommended feeding method is continuously as received or as an aqueous solution to a cooling waterline, cooling tower basin or spray pond. The feeding equipment should be of plastic or stainless steel construction.

Wear suitable protective gloves and safety goggles. In case of contact immediately flush with plenty of water. After eye contact seek medical advice. In case of spillage, absorb with sand or other absorbent materials and sweep up. Then flush the area with water. Before use review the Material Safety Data Sheet for additional information.