Safe use of hydrofluoric acid university of connecticut. Hydrofluoric acid is used as an etchant in the development of designs on aluminum. Steel drums and tank cars have been used for a number of years for the shipment of the higher strengths of aqueous hydrofluoric acid. Hydrogen fluoride readily dissolves in water to form colorless hydrofluoric acid solutions. Msds material safety data sheet hydrofluoric acid 70%. Plastics chemical resistance chart curbell plastics. Contain or totally enclose the process if possible. 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. Purchase hydrofluoric acid in more dilute forms where possible to eliminate handling the concentrate. Methods and materials for containment and cleaning up for nonemergency personnel for emergency responders.
Added consideration must be given to pump selections when the chemical is abrasive, viscous in nature, or has a specific gravity greater than 1. Nickel containing alloys in hydrofluoric acid, hydrogen fluoride. Oct 21, 2014 hydrogen fluoride is a colorless, fuming liquid or gas with a strong, irritating odor. Causes severe burns which may not be immediately painful or visible. Chemical resistance chart introduction corrosion and degradation depend on many parameters. Aqueous solution conc concentrated aqueous solution sat saturated aqueous solution no data available. Hydrofluoric acid will penetrate skin and attack underlying tissues. However, because it is absorbed, medical treatment is necessary. The information in this chart has been supplied by reputable sources and is to be used only as a guide in selecting equipment for appropriate chemical. Calcium gluconate combines with hf to form insoluble calcium. Hydrofluoricacidresistant and hydrophobic puresilica. Corrosion resistant materials stainless steel hastelloy inconel elgiloy carbon steel aluminum titanium brass. Water spray or fog may be used where concentrations below 60% are present.
Nitric acid, sulfuric acid, hydrochloric acid, hydrofluoric acid, perchloric acid. Corrosionresistant alloy an overview sciencedirect topics. Solutions of hf are colourless, acidic and highly corrosive. Chemical compatibility chart metallic materials used in bal. See also the information in for nonemergency personnel. Pain associated with exposure to solutions of hf 150% continued. The following materials descriptions are of a general nature.
Anhydrous hydrogen fluoride ahf and hydrofluoric acid solutions hf materials of construction page 6 of 25 2. Acetal polyoxymethylene chemical compatibility chart. Novel polymeric protective coatings for hydrofluoric acid. Aluminum alloys are not fit for use in hydrofluoric acid applications, its damaging action is constant and creates a bright appearance to the metal. Pvdf also known as kynar, is a highly inert and pure thermoplastic fluoropolymer.
Pdf possible hazardous effects of hydrofluoric acid and. In case of fire, the sealed containers can be kept cool by spraying with water. Copper, red brass cu15 zn, special treated carbon steel and chromiumnickelmolybdenum steel represent materials of high resistivity against concentrated. It is usually shipped in steel cylinders as a compressed gas. Hydrofluoric acid corrosion study of highalloy materials info. Hydrofluoric acid properties imperial college london. Nickel, a name which covers a range of generalpurpose corrosionresistant materials. Working with hydrofluoric acid department of commerce. Normally, copper is sensitive to aeration and velocity factors in hydrofluoric acid. Msds material safety data sheet 112 potential health effects exposure to hydrofluoric acid can produce harmful health effects that may not be immediately apparent.
Hydrofluoric acid hf has a number of physical, chemical, and toxicological properties that make it especially hazardous to handle. Hf chemical burns can be treated with a water wash and 2. Chemical compatibility table university operations. Alloy selection for service in hydrogen fl uoride, hydrofl.
Chemical compatibility chart metallic materials used in. The corrosion tables provide an initial guide to the selection of materials and are intended to facilitate understanding of the different types of corrosion damage that can. Follow the msds recommendations for safe storage, handling, first aid, spill management and disposal of the material. The useful properties of uranium tetrafluoride and hexa fluoride has. Chemical resistance for plastics find plastic materials and their resistance to different chemicals. Hydrogen fluoride and hydrofluoric acid are available in four grades. Chemical compatibility chart metallic materials used in bal seal products technical report tr60c rev. This will corrode both carbon steel and stainless steel very fast. It can be used in the production of pphenylenediamine, polycarbonate calcium chloride 10% brine % food 26% steel 18% oil 18% other 15%. Hydrofluoric acid ppe eyes tightfitting goggles or fullface shield in conjunction with goggles handsmedium or heavyweight neoprene, natural rubber, viton or nitrile gloves wearing two pairs of gloves is recommended always consult the manufacturers glove selection guide bodylab coat, acid resistant apron, long pants, closedtoed shoes. Hydrofluoric acid hf has a number of physical, chemical, and toxicological.
Before permanent installation, test the equipment with the chemicals and under the specific conditions of your application. However, since the resistance of metals, plastics and elastomers. To see a full table of resistance ratings for different chemicals, view our printable chemical resistance chart rubber chemical resistance. The compositions of the alloys mentioned are shown in table 1. Chemical resistance guide everything inside the fence. Both anhydrous hydrofluoric acid and aqueous solutions are clear, colorless, and highly corrosive liquids. University of rochester hydrofluoric acid safe handling guidelines calcium gluconate gel calcium gluconate gel is a topical antidote agent for first aid treatment of hf skin exposure. Guidelines for the safe use of hydrofluoric acid department of. Does anyone have a list of metals and metal oxides that do not react with hydrogen fluoride hydrofluoric acid. Glove selection in general latex and nitrile gloves are by far the most common gloves used in research laboratories on campus. Chemical resistance chart acetaldehyde alcohols propyl. Inorganicbased films such as silicon nitride, alumina, sic, polysilicon, etc. 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. Hydrochloric acid is also used in many other production processes for organic chemicals.
A new technique for the silylation of puresilicazeolite mel lowk films has been developed in which the spinon films are calcined directly in trimethylchlorosilane or 1,1,1,3,3,3hexamethyldisilazane hmds in order to protect the films against corrosive wet etch chemicals and ambient moisture adsorption. Use water or carbon dioxide on fires in which hydrofluoric acid is involved. Safe handling, storage, and disposal of hydrofluoric acid. Metallic materials when a small ahf leak or diffusion mixes with moisture in the air it forms a highly corrosive aqueous hf acid. Hydrofluoric acid chemical safety information hydrofluoric acid hf differs from other acids because the fluoride ion readily penetrates the skin, causing destruction of deep tissue layers, including bone. Zs1033 has a good anticorrosion coatings resistant to hydrofluoric acid hydrofluoric acid, nitric acid mixed acid ratio, stainless steel pickling plant has been widely used, is an important resistance to hydrofluoric acid corrosion coating materials, are energy and steel, concrete good adhesion, adhesion grade 1. Seastar chemicals inc msds hydrofluoric acid page 3 of 7 extinguishing media. Chemical resistance chart rubber chemical resistance. Hydrofluoric acid university of california, berkeley. Hydrofluoric acid is a solution of hydrogen fluoride hf in water.
Copper tubing, because of its convenience, and copper pipe have been used in hydrofluoric acid service but due to sensitivity to high velocity corrosion should be used with caution. Check the chemical compatibility of acetal and delrin with various chemicals, solvents, alcohols and other products. May cause sore throat, coughing, labored breathing and lung congestioninflammation. Have a question on the chemical resistance of plastics. Safety data sheet hydrofluoric acid 49 % 000000001555 page 2 14 version 2. The design of plants for handling hydrofluoric acid icheme. If specialized clothing is required to deal with the spillage, take note of any information in section 8 on suitable and unsuitable materials. It has many superior properties as a thermoplastic. Which alloy is best for use in hydrofluoric acid applications. Does anyone have a list of metals and metal oxides that do.
The ratings for these materials are based upon the chemical resistance only. Standard latex exam gloves are cheap and do provide protection. Pvdf has excellent chemical resistance against halogens such as chlorine and bromine, strong acids such as hydrofluoric and nitric acids, organic. Corrosive to eyes causes itching, burning, redness and tearing. Alloy 400 suffered cracking in hf environments in the vapor phase but not in the liquid phase. Corrosionresistant alloys cras are an advanced technology that is better suited to the requirements needed in. In an alternative procedure, hmds is also added to the zeolite suspension before film. University of rochester hydrofluoric acid safe handling. This tool can be used to view the resistance of thousands of chemicals with different rubbers such as viton and nitrile. Hf is also used in a number of anhydrous hydrogen fluoride ahf, 70% hydrofluoric acid, 48% reagentgrade hydrofluoric acid, and 49% electronicgrade hydrofluoric acid.
Temperature pressure concentration impurities phvalue materials and surfaces characteristics joinings e. Possible hazardous effects of hydrofluoric acid and recommendations for treatment approach. Pain associated with exposure to solutions of hf 150% may be delayed for 124 hours. Pdf version of this document chemical information overview hydrofluoric acid hf differs from other acids because the fluoride ion readily penetrates the skin, causing destruction of deep tissue layers, including bone. In hydrofluoric acid corrosionresistant materialsinis. It should never be considered a substitute for medical evaluation and treatment of hf exposures. 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. Corrosion of metals in fluorine and hydrofluoric acid. Nickelcontaining alloys in hydrofluric acid, hydrogen fluoride, and flu orine created date.
Metal materials for handling aqueous hydrofluoric acid. Use extinguishing agents compatible with acid and appropriate for fire surrounding hydrofluoric acid containers. Information regarding the chemical resistance of the unlisted materials is available on request. Many materialshave useful resistance to aqueous hydrogen fluoride when completely immersed in the. Wherever possible, replace hydrofluoric acid with a less hazardous substance. Where aqueous solutions are shown the concentration as a weight % is given. It is a precursor to almost all fluorine compounds, including pharmaceuticals such as fluoxetine prozac, diverse materials such as ptfe teflon, and elemental fluorine itself. This information, based on experience to date, is believed to be reliable. In either case, the tracercarrier should be added to the sample during the first step of chemical change e. Hydrofluoric acid 100% d d d d d b d d d c d a d c d d d d. It is used to make most fluorinecontaining compounds. Read the entire safe handling, storage, and disposal of hydrofluoric acid user guide.
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