Nalco | 3688 __hot__
Nalco 3688 is a high-performance, single-component oxygen scavenger and metal passivator developed by Nalco Water (an Ecolab company). It is widely used in industrial boiler systems to prevent corrosion.
This guide covers the product's function, application, benefits, and handling. nalco 3688
What is Nalco 3688?
Nalco 3688 is a proprietary, multi-functional liquid treatment chemical manufactured by Ecolab’s Nalco Water division. It is primarily formulated for use in open recirculating cooling water systems, though it finds limited application in closed loops and once-through systems. What is Nalco 3688
The chemical is best described as a stabilized phosphate-based corrosion inhibitor blended with proprietary polymers for scale control. Unlike simple orthophosphate treatments, Nalco 3688 is designed to provide a dual-action mechanism: Anodic corrosion inhibition via phosphate films on metal
- Anodic corrosion inhibition via phosphate films on metal surfaces (steel, copper, and copper alloys).
- Threshold scale inhibition via dispersant polymers that prevent calcium carbonate, calcium phosphate, and iron oxide deposition.
It is typically supplied as a clear to amber liquid with a neutral to slightly acidic pH. The product is part of Nalco’s legacy “3000 series” of cooling water treatments, known for their reliability in moderate to large industrial systems.
What is Nalco 3688?
Nalco 3688 is a proprietary, high-concentration, oil-soluble surfactant blend manufactured by Nalco Water (an Ecolab company). While the exact chemical formula is proprietary, it is broadly classified as a polyglycol ether and alkylaryl sulfonate blend. It is designed primarily for the crude oil production industry to resolve difficult water-in-oil emulsions.
Unlike generic demulsifiers that rely solely on heavy solvents, Nalco 3688 utilizes a unique "reaction chemistry" that actively seeks out and breaks interfacial films surrounding water droplets.
