As a result, using propylene glycol-based antifreeze in a fire protection system could increase the rate of corrosion versus using a glycerin-based antifreeze. R    Privacy Policy More of your questions answered by our Experts, An Understanding of Today's Wet Abrasive Blasting Equipment, Proper Pipeline Joint Isolation - History of Design, Flanges, and the Best Available Design, Bituminous Coatings: When and How to Use Them, A Guide to Flash Rust Prevention and Protection (free PDF), Buffering of organic acids formed as a result of glycol oxidation, Compatibility and full functionality in glycol-water and glycol-ethanol mixtures. Iron-based materials such as steel and cast iron are the usual choice for HVAC system piping. L    Please note that temperature or concentration information are not given for this corrosion rate. C-Kool is an inhibited propylene glycol that is used as an industrial coolant and heat transfer agent. T    This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. Because propylene glycol has a low toxicity level, it can be used in equipment that has contact with food products and beverages. M    Hot-dip vs Cold Galvanizing: What’s the Difference? Propylene glycol (also known as 1, 2-propanediol) is a chemical compound with the molecular formula C 3 H 8 O 2. Propylene glycol (IUPAC name: propane-1,2-diol) is a viscous, colorless liquid, which is nearly odorless but possesses a faintly sweet taste. The following are the key activities of a well-selected inhibitor that should be evaluated and closely monitored for continuous efficacy: Corrosionpedia Terms:    Centennial, Colorado 80112, Phone: 720.554.0900 C-Kool is produced from USP grade Propylene Glycol, with corrosion inhibitor additive and is intended for use where incidental contact with food or potable water … 419. The higher maximum operating range allows for greater thermal stability under continuous heavy-duty operation. It buffers the organic acids formed as a result of glycol oxidation. PROPYLENE GLYCOL (INTERCOOL P-300) INTERCOOL P-300 is chemically engineered using organic and inorganic inhibitors for corrosion protection in a propylene glycol base and used as an industrial heat transfer fluid. Ask an Expert. Propylene Glycol Coolant is a transparent orange liquid. Any standard automotive-grade glycol (aka antifreeze) (ethylene or propylene) should be fine, having much the same inhibitors as metalguy suggests. It is an organic solvent clear in color, and corrosive to most metallic surfaces. E    V    Where can I find a coating that is chloride and sulfur corrosion-resistant? Heat transfer fluid formulation of propylene designed package of industrial corrosion inhibitors. propylene glycol fluids: viscosity and toxicity. This is why corrosion inhibitors are added to glycols used as heat transfer fluids. Propylene glycol is less toxic and is considered when toxicity is a concern. B    In the absence of inhibitors, propylene glycol can react with oxygen and metal ions, generating various compounds including organic acids (e.g., formic, oxalic, acetic). Place your order through our on-line store, to reduce your cost and waiting period. 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U    When a glycol-based fluid is introduced to such a system, however, the fluid must include an inhibitor formulation to prevent corrosion caused by acids formed by glycol degradation. DowFrost contains special corrosion inhibitors for low system maintenance and better heat transfer compared to other glycols. Home » NO, Are you still looking for the right answer? These acids accelerate the corrosion of metals in the system. Terms of Use • We deliver to clients across Canada, with your order shipped in 3-4 business days. Therefore, they generally provide superior heat transfer efficiency and better low temperature performance and are preferred for most heat transfer applications. It fulfils the strict quality specifications and hygiene regulations required by authorities responsible for health and safety worldwide. Multi-metal inhibitors generally reduce the occurrence of corrosion via several mechanisms. The biodegradation process requires oxygen; therefore, dissolved oxygen (DO) concentrations in receiving waters may be negatively impacted following a large Propylene Glycol release. Fax: 720.554.0909, General Information How should I choose between a polyurethane and an epoxy coating on concrete floors? 6881 South Holly Circle, Suite 108 I    It is intended for water systems that require corrosion protection. It is design for antifreeze or boiler applications and will provide freeze protection and corrosion protect against iron, aluminum, and … It also has a longer fluid life, up to 20 years in some cases. Search. Ethylene Glycol (EG) has very important characteristics that tailor the coolant mix to the automotive application. Y    It maintains thermal circuits in perfect condition for longer periods of time than conventional products and much better than Propylene Glycol USP with water without corrosion … In general, glycols are non-irritating and have very low volatility. K    First, the inhibitors in Freez-Kontr’l passivate the system’s metal surfaces, protecting The information provided herein is not intended as a representation or warranty on the part of the AGA. It is important to use additional chemical inhibitors in conjunction to propylene glycol when it is applied to metallic surfaces. Propylene glycol is a synthetic food additive that belongs to the same chemical group as alcohol. INTERCOOL® P-300 is designed for heavy duty demanding applications that require a higher level of corrosion inhibitors and pH buffers. DOWFROST is a propylene glycol-based fluid that contains a specially formulated package of industrial inhibitors that help prevent corrosion. Its chemical formula is CH3CH(OH)CH2OH. Terms of Use - - Renew or change your cookie consent, An Intro to Pipeline Corrosion and Protection Methods, Innovative Coating Solutions for Oil Sands Equipment, 7 Methods of Coating Thickness Measurement. Sierra Propylene Glycol Antifreeze. D    Source: Propylene glycol is used as an organic solvent and diluent in pharmaceuticals and many other industrial applications. Propylene glycol methyl ether is used as an antifreeze in diesel engines. What is a plural component protective coating and what is it used for? In most cases you should mix glycol with water. G    Chemtex's Propylene Glycol Corrosion Inhibitor is a specially formulated chemical additive designed to prevent corrosion in multi-ways. Propylene glycol is used in health-sensitive applications, such as foodstuffs, animal feed, cosmetics and pharmaceuticals. Propylene glycol-based antifreeze solutions typically have a much higher electrical conductivity than glycerin-based antifreeze solutions, with a range of about 1800-2500μS/cm. Propylene glycol heat transfer fluid contains a performance additive that prevents metal corrosion, lowers maintenance costs and improves heat transfer. Then, provided no path for air to contact the fluid, any corrosion will progress only until the dissolved oxygen in the fluid is consumed. Let us … C    An industrially inhibited glycol is essential in HVAC systems with steel piping to prevent fouling, clogging, and the buildup of precipitate… This product is preferred for use where low toxicity is desired. How Corrosive is Propylene Glycol to Hot-Dip Galvanized Steel? P    Your On-Line Source for propylene glycol, ethylene glycol, corrosion inhibitors and buffer solutions. For example, if the freeze protection needed is -20°F then the minimum amount of propylene glycol needed is 46% by volume (47% by wt. S    PEAK Automotive Coolants are formulated to meet or exceed the performance requirements of every major car and truck manufacturer in order to provide maximum protection. It treats the surfaces of the metal making them less susceptible to corrosion. ComStar's ProFrost (Propylene Glycol) and Frost Free (Ethylene Glycol) are premium industrial coolants that can be ordered with/or without a color and with/or without a corrosion inhibitor package designed to prevent system corrosion and clog-up’s. H    Propylene Glycol is a propanediol that exists as a clear, colorless and hygroscopic liquid and consists of propane where the hydrogens at positions 1 and 2 are substituted by hydroxyl groups. Propylene Glycol Based Fluids P150 P150N HD P200 P150 JEFFCOOL® P150 Proven corrosion prevention Use in place of brine or uninhibited glycol/ water solutions Foam suppression Lowers maintenance costs Improves heat transfer LEARN MORE P150N JEFFCOOL® P150N Proven to prevent cavitation, or ‘pitting’ corrosion Recommended for use in heavy duty equipment and machinery Foam … The fluid is dyed yellow for leak detection. Custom blends readily available. Z, Copyright © 2021 Corrosionpedia Inc. - Industrial Inhibitors You would add one container and let it circulate and take another pH reading. Corrosion Resistance of Zinc and Zinc Alloys, pg. Privacy Policy • Propylene glycol (also known as 1, 2-propanediol) is a chemical compound with the molecular formula C3H8O2. The current thinking for automotive coolant is to dilute water with enough ethylene glycol and corrosion inhibitors to change the poor characteristics of water, while retaining the good ones. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel. It provides optimum corrosion protection for most metals, including copper, steel, brass, etc., and it does in two ways. X    ). Propylene Glycol Rust Inhibitor ChemWorld SR1 Glycol Corrosion Inhibitor is a concentrated corrosion inhibitor designed for glycol system that need corrosion resistance protection. Reactions with dissolved oxygen can lead to the formation of organic acids that attack unprotected metal surfaces. Similar to ethylene glycol, when inhibited, these glycols also protect HVAC systems against damage from corrosion. 2 gallons is enough chemical to use to convert one 55 gallon container from just propylene glycol to corrosion inhibited propylene glycol. It is an organic solvent clear in color, and corrosive to most metallic surfaces. J    Menu • © 2020 American Galvanizers Association. Straight propylene glycol is used in systems that do not require corrosion protection. You would only want to add Sludgehammer if your pH is below 9.5 for non-aluminum system. Please note that temperature or concentration information are not given for this corrosion rate. These metals generally offer good corrosion resistance in the presence of water and glycols. Other antifreezes. Because propylene glycol fluids have low acute oral toxicity, DOWFROST is often used in applications where contact with food or beverage products could occur. O    According to Frank Porters book, Corrosion Resistance of Zinc and Zinc Alloys, propylene glycol will corrode zinc-coated steel less than 0.5 mil per year. Ethylene glycol-based glycol-based fluids. This makes the surface less susceptible to electrochemical attack. Propylene glycol and ethylene glycol are widely used in the HVAC industry to protect systems from damage caused by freezing and corrosion. In regards to corrosion, you need to confirm with your Boiler manufacturer as to what level of propylene glycol they want you to not exceed. A    In general, the main issue with glycols is the formation of acids by glycol degradation at elevated temperatures. W    ChemWorld Inhibited Propylene Glycol comes as a 95% inhibited propylene glycol or in premixed solutions. Propylene Glycol is highly soluble in water, and readily metabolized by microbes and higher organisms once released into the environment. It is safe to handle as it is composed of propylene glycol. #    aga@galvanizeit.org, Site Map • Best suited for applications with operating temperatures in the -51°C (-60°F) to 149°C (300°F) range. Ethylene glycol solutions are normally preferred over Propylene Glycol because of their more desirable physical properties particularly at lower temperature. Glycol based systems, using Propylene Glycol or Ethylene Glycol, without any corrosion inhibitors or additives, are more corrosive and aggressive than water alone. Q    Industrially inhibited propylene glycol fluid with an operating range of -60F to 350F. Corrosionpedia explains Propylene Glycol Corrosion Protection Freez-Kontr’l contains the best available corrosion inhibitor package for use with propylene glycol. The goal should be to minimize the amount of glycol in the fluid mixture, while maintaining the needed freeze protection and corrosion inhibitor content. These blends use either high quality technical grade propylene glycol or food grade propylene glycol with or without corrosion inhibitors and additives to fit your process. Anyone making use of this information assumes all liability arising from such use. Newsletter Signup: Sign up for Galvanizing Insights, the AGA's quarterly specifier e-newsletter. | The incorporated propylene glycol inhibitor serves to modify metallic surfaces by absorption. Choosing the Proper Glycol; An inhibited propylene glycol such as “DowFrost” is best. N    Then again, this is a closed-loop cooling circuit, correct? It is a colorless, odorless, slightly syrupy liquid that is a bit thicker than water. According to Frank Porters book, Corrosion Resistance of Zinc and Zinc Alloys, propylene glycol will corrode zinc-coated steel less than 0.5 mil per year. © 2021 American Galvanizers Association. Propylene glycol is also used for its heat transfer and freeze protection properties. American Galvanizers Association Use of Uninhibited Glycol Containing two alcohol groups, it is classed as a diol. For systems, with metal you may select a corrosion inhibited glycol system or purchase a propylene glycol product and use a corrosion inhibitor overlay. The chosen corrosion inhibitor must be formulated for propylene glycol to protect metals from corrosion. Was this answer helpful? Quick Links • The primary difference between propylene glycol and ethylene glycol is toxicity and heat transfer characteristics. It is miscible with a broad range of solvents, including water, acetone, and chloroform. 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