Composition keeps steam-generating machines running
The U.S. Patent and Trademark Office has issued patent No. 7,857,989 to Ted Beardwood, applications project manager, Ashland Water Technologies.
What is it?
The patent is a metal oxide dispersant composition that helps decrease corrosion in steam-generating systems.
Corrosion occurs when metal oxides (elements combined with oxygen) form on metal surfaces. Iron oxide in particular, results in reduced heat transfer rates and slower performance. These deposits can increase metal temperature and, over time, can destroy the metal in machines such as boilers, heat recovery steam generators, evaporators, crystallizers and vapor-recompression equipment.
Several chemicals, known as dispersants, have been used to combat corrosion deposits on metal surfaces. The patented composition uses an oxime (chemical compound) in addition to chemical dispersants to increase their effectiveness.
The application of the chemistry is unique to Ashland, found in our Mekor™ corrosion inhibitors as well as other products that contain the active ingredient. It is also synergistic to our dispersant product lines such as Drewplex™, Drewphos™ and Advantage™, used in high-temperature applications.
The composition translates to financial savings and improved machinery performance. Significant cost savings can be realized from lower fuel consumption, fewer equipment cleanings and repair from overheating and corrosion. With decreased deposit formation, the heat inputted to the heat exchanging portions of the system is transferred more efficiently, increasing the machine's lifespan.