This information, based on experience to date, is believed to be reliable. In terms of hcl, the most resistant fasteners available are tantalum. Acid, hydrochloric hydrogen chloride nr nr a nr q a nr nr nr nr a a a acid, hydrocyanic prussic a a a a a a. Metals and corrosion resistance engineering toolbox. In general, stainless steels cannot tolerate aggressive hcl solutions, hence the need to use corrosionresistant nickelbased alloys. Chemical resistance chart introduction corrosion and degradation depend on many parameters. The corrosion data in this section is mainly based on the results of general corrosion laboratory tests, which are not strictly comparable with actual service conditions. Corrosionresistant materials and coatings for installations where extreme corrosive fumes are encountered, hartzell fiberglass fans give unsurpassed resistance to the great majority of corrosive elements at a cost substantially below that of corrosion resistant metals.
Store in a cool, dry, ventilated storage area with acid resistant floors and good drainage. Added consideration must be given to pump selections when the. Page 1 of 20 pvc chemical resistance chart ratings guide good should have little or no effect on the material at the given concentration and temperature moderate some effect on the material at the given concentration and temperature. Once it is dissolved in water hydrochloric acid is formed and this is corrosive to many metals and alloys. Hydrochloric acid, or muriatic acid by its historical but still occasionally used name, has been an important and frequently used chemical from early history and was discovered by the alchemist jabir ibn hayyan around the year 800. Need low cost alternative to hastelloy b for boiling hcl acid december 16, 20 this entry appended to this thread by editor in lieu of spawning a duplicative thread. Hydrochloric acid is produced in the united states primarily by four basic methods. Personnel should be properly trained in the handling of hydrochloric acid and should always wear the proper protective equipment when working around hydrochloric acid. Download the viton msds pdf viton a201 spec sheet pdf the following information is available from dupont. The authors are basically opposed to the presentation of information in simplified chart form if this material alone is to be used. The process requires a acid bath by hcl of pipes before galvanising. Do not allow contact between hydrochloric acid, metal, and organics. Choosing the right materials of construction for process hardware and equipment is crucial for achieving desired service life. Corrosion resistance of ceramic materials to hydrochloric acid.
The isocorrosion chart below shows the relative corrosion resistance of several specialty alloys and exotic metals in various concentrations and temperature of hydrochloric acid hydrogen chloride. Hydrochloric acid is classed as reducing acid and lacks the oxidising properties that stainless steel need to maintain their passive corrosion resistant surface layer the acid is formed as a product of the pitting crevice corrosion mechanisms in stainless steel and so when hydrochloric acid is present in any external. Pump compatibility chart these recommendations are based upon information from material suppliers as well as careful examination of available published information, and are believed to be accurate. Examples of materials resistant to corrosion by hydrochloric acid include acidresistant glass, acidresistant ceramics, acidresistant rubber linings, rigid vinyl chloride, polyethylene, and acidresistant frp. Hydrochloric acid is by far the most important chemical for corrosionresistant nickel alloys in the chemical process industries.
Concentration impurities phvalue materials and surfaces characteristics joinings e. Materials selection for use in hydrochloric acid surface science. It can be applied directly using hand layup process onto the surfaces of concrete, open terrace, parapet wall, steel, plastic etc. Ataglance corrosion chart for sulfuric acid is based on an extensive survey of construction materials. Hydrochloric acid hcl is an important mineral acid, second only to sulfuric acid h 2so 4 in its uses in industry. Not only is it widely encountered, but also it is very aggressive to the stainless steels. Chemical resistance chart acetaldehyde alcohols propyl chemical resistance data these recommendations are based upon information from material suppliers and careful examination of available published information and are believed to be accurate. In green death, the lowest temperature at which pitting has been observed in c276 alloy is the boiling point. Hcl solutions, hence the need to use corrosion resistant nickelbased alloys. All chemical resistance data for ethylene propylene epdm and fluorocarbon fkm contained within this manual has been provided, with written consent, by parker hannifin corporation.
The concentration limit of 20% hydrochloric acid is the azeotrope, beyond which high temperature corrosion tests are less reliable. Chemical compatibility chart metallic materials used in. Hydrochloric acid hcl is an important mineral acid with many uses, including the pickling of steel, acid treatment of oil wells, and chemical cleaning and processing. Electroless nickel a nickel coating containing 510% phosphorous applied by chemical reduction. Major applications include acid pickling of steel, acid treatment of oil wells, chemical cleaning and processing, ore reduction, production of chlorine and chlorides and food 1 paper no. So glass, being silicon dioxide, which is actually acidic, is a good example. Due to elevated temperatures, fluctuating concentrations and permeation of its vapors, utilizing the correct material for your. Follow good hygiene procedures when handling chemical materials. Hcl must also be constructed of acid resistant materials such as pvc, rubber, teflon, ceramic and hastalloy c. Corrosion resistance of different materials compound iron and steel cast iron ni resist 300 series stainless monel inconel incoloy copper lead aluminum nickel acetic acid, crude x c f f c f x f f pure x a c f f a f vapors x f c f x c f 150 psi. Bennett united states department of the interior james g.
Usually, a more resistant alloy such as alloy 400 or alloy c276. In either case, the tracercarrier should be added to the sample during the first step of chemical change e. The information in this chart has been supplied to coleparmer by other reputable sources and is to be used only as a guide in selecting equipment for appropriate chemical compatibility. Acid resistant valves for use in challenging conditions finding secure, dependable valves for use with corrosive chemicals, or other toxic substances can be a challenge. Hydrochloric acid must be handled with appropriate safety precautions because it is a highly corrosive liquid. Hcl is a strong reducing acid, which makes it highly corrosive when in contact with most materials. Corrosion resistance of ceramic materials to hydrochloric acid by james p.
Zirconium fasteners are second best, exhibiting a corrosion rate of less than 5mpy at all concentrations and temperatures of hcl below the boiling point. Never use hot water and never add water to the acid. Do not use viton with acetone, esters, amines, organic acids, acetic acid, mek, ethyl acetate, highly polar chemicals, etc. Chemical compatibility chart metallic materials used. Highperformance alloys for resistance to aqueous corrosion. Polypropylene chemical resistance guide hmc polymers. Basically excuse the pun, anything thats not a base. All chemical resistance data for ethylene propylene epdm and fluorocarbon fkm contained within this manual has. However, subtle changes in stream composition or conditions often can profoundly affect corrosion rate and even foster a different corrosion mechanism. This chemical resistance guide has been compiled to assist the piping system designer in selecting chemical resistant materials. Material corrosion resistance guide fluid technology. Some metals, like platinum, are acid resistant, but many arent. Hcl tank frp lining is a nontoxic highly crosslinked coating with exceptional chemical resistance to a wide range of chemicals and gases even at elevated temperatures.
Horton, director research at the fliscaoosa research centef is carried alit under a. The hcl used is usually of 35% strength and because the bath is open,the acid vapor heavily corrodes the steel shed above. If a skin or mucous membrane is exposed to hydrochloric acid, the site. A variety of methods have been proposed many are used for the presentation of corrosion data in concise form. However, since the resistance of metals, plastics and elastomers can be affected by concentration, temperature, presence of other. Information regarding the chemical resistance of the unlisted materials is available. Usually, economics dictate the use of materials that will corrode, but at an acceptable rate, in the given service. Viton withstands high temperature better than most other elastomers, and retains its good mechanical.
Hydrochloric acid these corrosion data are mainly based on results of general corrosion laboratory tests, carried out with pure chemicals and water solutions nearly saturated with air the corrosion rate can be quite different if the solution is free from oxygen. This acid is extremely corrosive and its aggressiveness can change drastically depending on its concentration, the temperature, and contamination by oxidizing impurities. Request pdf materials selection for use in concentrated hydrochloric acid. These recommendations are based upon information from material suppliers and careful examination of available published information and are believed to be accurate. Hydrochloric acid,acs created by global safety management, inc. Furthermore, hydrochloric acid is indirectly responsible for the insidious effects of chloride salts on metallic materials. Hardide is particularly effective at protecting against mineral acids, including hcl, nitric acid and h2so4.
This chart outlines the top performers in hydrochloric acid. Materials selection for use in concentrated hydrochloric acid. Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride gas. Aqua regia 80%, hcl, 20%, hno da dca c arochlor 1248 ada d b aromatic hydrocarbons adc a. Aqua regia 80%, hcl, 20%, hno d d d a d d c d d a d d d d c d. No wetted parts shall contain metals such as carbon steel, stainless steel, brass or aluminum. Polyurethane chemical resistance chemical resistance of polyurethane pur. Alloy selection for service in chlorine, hydrogen chloride.
Chemical resistance chart acetaldehyde alcohols propyl. If a material is chemically resistant to the concentrated form of a specific chemical, it should be resistant to the diluted form of that same chemical. Hydrochloric acid is a highly corrosive and hazardous chemical and should be handled with extreme care. Acid proof tank lining frp lining services in rain.
Selection stainless steel for handling hydrochloric acid hcl. Before permanent installation, test the equipment with the chemicals and under the specific conditions of your application. Similarly, dry hydrogen chloride hcl is not corrosive to most metals. Careful consideration must be given to temperature, pressure and chemi.
When loading and unloading using a tank truck, make sure that the manual. They are also affected by 98% sulfuric acid at 60c 140f and fuming nitric acid and liquid bromine at room temperatures. While hydrochloric acid hcl is a common and critical industrial chemical, it often causes significant maintenance issues for fasteners. What ferrous material is fully resistant to hydrochloric acid. Corrosionresistant alloys from the special metals group of companies 4 alloy selection for corrosive environments 11 corrosion by acids 12 sulfuric acid 12 hydrochloric acid 17 hydrofluoric acid 20 phosphoric acid 22 nitric acid 25 organic acids 26 corrosion by alkalies 28 corrosion by salts 31 atmospheric corrosion 35 corrosion by waters 37. Dear sir, we are a company based in india manufacturing g. The material presented in this publication has been prepared for the general information of. Acetic acid, glacia1 ba a cd b d acetic acid 20% ba a cd c acetic acid 80% ba ac db c acetic acid b aa cdb c. At hydrochloric acid concentrations above about 5%, c276 alloy provides a quantum improvement over the stainless steels, and offers much greater resistance to higher concentrations of both acids than alloy 625. The chemical resistance data presented in this pdf for a. Such alloys will typically be applied when stainless steel shows insufficent corrosion resistance in. Horton, director research at the fliscaoosa research centef is carried alit under a memorandum of agrbblltmt between the. The ratings for these materials are based upon the chemical resistance only. Sulfuric acid and hydrochloric acid dewpoint corrosionresistant.