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Boiler Antifreeze is an integral part of water system maintenance, whether putting up a new system or reusing an old one. Oil and grease that are left behind in boilers upon purchase or after repair can accumulate over time. If left untreated, these can cause foaming and priming, which in turn reduce boiler efficiency and accelerate tube failures. These can hamper boiler operations in the long run.
Different products for Boiler Antifreeze are available depending on specific needs. For boilers made of stainless steel, sulfamic acid is suitable. Sulfamic acid is a white crystalline and water-soluble compound, commonly used in water treatment and synthesis of artificial sweeteners. It has a chemical formula of H3NSO3 and is also known as amidosulfuric acid, aminosulfonic acid, amidosulfonic acid, and sulfamidic acid. Aside from water treatment, it is also used as a standard solution for alkalimetry, acid cleaning, nitrite removal, and chlorine stabilization for cooling towers.
Sulfamic acid is available through ChemWorld.com as Q-CID S. It is a highly effective inhibitor with a special formula that targets and removes iron and water precipitates. Q-CID S is safe for human use, as it is approved by the USDA for federally inspected meat and poultry processing plants.
Q-CID S is usually added to cleaning water systems at a rate of one to ten percent, depending on the amount of deposits to be removed. After which, it is recirculated to the system for two to eight hours. During this time, acid strength may be monitored. Solution can also be heated to help speed up chemical reaction and deposit removal. Then, a neutralizing solution should be filled and circulated for at least an hour after cleaning, draining, and flushing to countercheck remaining pockets of trapped acid solution. Passivation is followed to inhibit metal surfaces from corrosion.
* Appearance: white granular powder
* Odor: slightly pungent
* pH: >2.5 (1% solution)
* Solubility: water (~12%)
* Flashpoint: none
* Density: 65-70 lbs./ft3
* Incompatibility: strong alkali and oxidizing agents
Handling and Storage
Always store product in a tightly closed container and away from incompatible sources. Place it in a cool, dry, and well-ventilated area. Before handling the substance, wear goggles and rubber gloves. Sulfamic acid can be toxic when ingested and corrosive to human tissue when exposed to skin. If swallowed accidentally, drink at least two glasses of water. In case of eye exposure, wash eyes with water for 15 minutes or more until relieved. For skin exposure, wash areas thoroughly with soap and water. Remove exposed clothing and wash thoroughly before reuse. In all cases, seek medical help immediately.
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