Stainless Steel Hastelloy Inconel Elgiloy Carbon Steel Aluminum Titanium Brass Aluminum Bronze CHEMICAL 302 304 316 316L . The selection of stainless steel 304 or stainless steel 316 types for applications involving prolonged contact, such as storage tanks, is not advisable. Nickel: Monel Iconel Hastalloy C Acetic Acid (20%) 21 A A A A A A Acetic Acid (50%) 21 . Dursan also has hydrophobic properties resisting sludge buildup and reducing surface adhesion. LAB CORROSION DATA FOR STAINLESS STEEL Media Temp Type Media Temp Type Media Temp Type + 304 316 + 304 316 + 304 316 Acetic Acid Carbolic acid B l l Hydrocyanic acid 70 l l 10% 70 l l Carbon tetrachloride diluted 1:85 70 lll ll B l l pure (dry) 70 l l B V V . Type 316 stainless steel is an austenitic chromium-nickel stainless and heat-resisting steel with superior corrosion resistance as compared to other chromium-nickel steels when exposed to many types of chemical corrodents such as sea water, brine solutions, and the like. Silicon stainless steels such as grade 1.4361 should be considered for hot, very . Chemical Compatibility Chart . Stl. It is an austenitic stainless steel alloy with high nickel (24%), chromium (22%), molybdenum (6%), and nitrogen (0.18%) content and is commonly known as superaustenitic stainless steel (alloys such as 254 SMO (UNS S31254) and 904L (UNS N08904) also fall . Increasing temperature quickly makes the steel useless. Following diagram shows the corrosion resistance in sulfuric acid. Fuel Oil (containing sulphuric acid) C B B B B A Gallic Acid (5% solution) 21 A A A A A B Gallic Acid (5% solution) 66 . Does 316 stainless steel rust? Alloy 20 - contains more nickel and chromium than 300 series stainless steel and with the addition of columbium that retards stress corrosion cracking and has improved resistance to sulfuric acid. Sulphuric Acid, Austenitic Stainless Steel _____ INTRODUCTION Corrosion is the destruction of a material resulting from . The challenge is to select a material that will corrode the least. Sulfuric acid. Just indicative, 20% sulphuric acid at 20 deg C would cause a corrosion rate of over 100 micrometers/year on SS 316 and over 1000 micrometers/year at 80 deg C even in small concentration (1-5%). This is an exception to the 'general rule' for stainless steels where the 316 types are normally found to be more corrosion resistant than 304 types. Types 316 and 316Ti are considerably more resistant than any of the other chromium-nickel types to solutions of sulfuric acid. The isocorrosion diagram for sulfuric acid is shown to the right. 316 Stainless Steel Chemical Compatibility Chart ver 10-Jan-2020 industrialspe . When considering a steel option, fume hood liners typically come in Type 304 or Type 316 Stainless Steel. Since Type 316 stainless steel alloy contains molybdenum bearing it has a . Type 316 can be used in contact with sulfuric acid up to 10% at termpera- tures up to 120F (50C) if the solutions are aerated; the attack is greater in airfree solutions. and greater than 85% wt. Abstract The corrosion behaviour of 316L stainless steel (316L SS) in 10% H2SO4 solution (94C) with various concentrations of NaCl (0-0.085 mol/L) was studied by immersion corrosion test and polarization methods, combined with SEM/EDS, XPS and XRD tests. Stainless Steel Chemical Resistance Chart Chemicals C-E A = Excellent. C = Fair. Hydrochloric Acid 304L and 316L have very limited use in hydrochloric acid due to the risk of general and localized corrosion. 316L Stainless Steel Chemical Compatibility Chart ver 16-Oct-2018 Chemical Chemical Acetaldehyde A Allyl Phenol A Acetamide A Alum Ammonium (ammonium aluminum sulfate) A Acetate Solvents, crude A Alum Chrome (chromium potassium sulfate) A Acetate Solvents, pure A Alum Potassium (potassium aluminum sulphate) A Acetic Acid, 10% A Aluminum Acetate A 316 stainless steel is the most widely used material for pump heads, check valves, balls and other wetted components. Satisfactory to 120F (48C) Ratings: Chemical Effect A = Excellent. The molybdenum gives Grade SS 316 high corrosion resistant properties and particularly high resistance to pitting and crevice corrosion in chloride environments. Abstract. This work presents a review of carbon steel corrosion in concentrated . Hydrochloric Acid. Due . B = Good, Minor Effect, slight corrosion or discoloration C = Fair, Moderate Effect, not recommended for continuous use. Explanation of Footnotes 1. more saline or chloride-exposed environments. Looking specifically at sulfuric acid, Type 316 is more protective. Phenol (Carbolic Acid) B-Good: Page 9 of 13 Kelco 15/12/2008: Phosphoric Acid (>40%) D-Severe Effect: Phosphoric Acid (crude) B-Good: Acceptable above about 90% at room temperature. The key difference between these two grades is the addition of 2~3% of molybdenum (Mo) to the 316 family of stainless steels. The high efficiency expressed in the factor of 30 will only apply in full in the case of high-alloy steels with increased molybdenum contents. C = Fair. The results showed that at lower NaCl contents (0-0.0085 mol/L . 304 and 316 stainless steel substrates are among the most commonly used grades of stainless steel materials in many industries. The acid will be diluted from 93% to less than 1% at the injection point. But again, the internet is overflowing with free information on corrosion resistance of most type/grades of stainless steels, or perhaps you would have . Where condensation of sulfur-bearing gases occurs, these alloys are much more resistant than other types of stainless steels. AL-6XN alloy is identified by the Unified Numbering System (UNS) designation of N08367. resistance of stainless steel is the efficiency sum (W) of % Cr + 3.3 x % Mo + 30 x % N. The influence of nitrogen as an alloying element is, however, more complex than expressed by this equation. Talk to a trusted advisor Access Expert-Level Services 316 Stainless Steel Stainless Steel In all stainless steels, chromium and nickel are critical for corrosion resistance and ductility. The data table below is an application guide, and indicates the . then 0.03%), and has even better corrosion resistance than. 10% Sulfuric Acid 122 140 167 60% Sulfuric Acid <54 <59 <57 96% Sulfuric Acid 113 77 86 85% Phosphoric Acid 203 176 194 203 . 316L stainless steel means that the metal is clearly corrosive. Figure 1. PTFE ABS (GF) Acetal (Delrin) Viton EPDM Nitrile Silicone St Steel 303/304 St Steel 316 Aluminium Brass Hastelloy C Titanium Alumina Ceramic Ceramic Magnet ASTM Oil No.1 A A A A A X A L ASTM Oil No . The catalyst for this reaction, sulfuric acid or para-toluene sulfonic acid (PTSA), was shown to cause more corrosion on reactor equipment than CH {sub 3}COOH under the process . -SS 316 L that is used in a sulfuric acid plant with a concentratio n of 98.5 % H2SO4 and 84-88 o C temperature, occurs damage form which follo ws the pattern of erosion corrosion . Service tests are most reliable in deter-mining optimum material, and ASTM G4 is a recommended practice for carrying out such tests. From the chemical composition, SS 316 has lesser chromium, and more nickel, and unlike SS 304, it has 2% molybdenum. The 304 types are preferable to 316 types for nitric acid applications however. Once fully diluted the corrosion will be insignificant. 304/304H 310M 316/316L Avesta 254 SMO: Ordinary steels if not protected from the atmosphere will oxidize or rust. By using this Steel finder online tool you agree to be bound by the Disclaimer. When the sulfuric acid-free electrolyte was used to electropolish the 316L stainless steel, the X-ray photoelectron spectroscopy (XPS) analysis shows that atomic Cr/Fe ratio of 316L stainless . I am aware that 316L has good resistance to high concentrations (>80%) as well as low concentrations (<10%) sulfuric acid. C = Fair, Moderate Effect, not recommended for continuous use. Sulfuric Acid is also referred to as oil of vitriol and vitriol. Moderate Effect, not recommended for continuous use. Types 304, 321 and 347 can normally be used only in very dilute sulfuric acid applications at room temperature, and show equally good resistance to corrosion. It describes duplex stainless steel 2205 offers significantly better resistance than SS 904l. 2. Type 316 has much better resistance to dilute sulfuric and can be used in a broader range of temperatures and concentrations. The corrosion of carbon steel storage tanks and pipes by concentrated sulfuric acid is a great concern. Softening, loss of strength, or swelling may occur. This addition drastically enhances the corrosion and oxidation resistance of the alloy . Type 316/316L stainless steel is a molybdenum beraing grade of steel. Satisfactory to 72F (22C) 2. In sulfuric acid contaminated by chloride ions, 2205 shows much better resistance than 316L and has similar resistance to 904L. Satisfactory to 120F (48C) Ratings: Chemical Effect A = Excellent. Satisfactory to 72F (22C) 2. 316 stainless steel will rust after a long time. The alloying addition of copper is most beneficial to extending the resistance of stainless steel in intermediate concentrations of sulphuric acid. 304 stainless steel: 18% chromium, 8% nickel. Electrical resistivity: 74 microhm-centimeters (20 degrees Celsius) Specific Heat: 0.50 kiloJoules/kilogram-Kelvin (0-100 degrees Celsius) Thermal conductivity: 16.2 Watts/meter-Kelvin (100 degrees Celsius) Modulus of Elasticity (MPa): 193 x 10 3 in tension. Corrosion of types 304, 304L, 316, and 316L stainless steel (SS) during the esterification of acetic acid and alcohol or glycol ether was investigated. The different properties and applications exhibited by both grades come as a result of these differences. 316 stainless steel has additional molybdenum that gives it resistance to chlorides and other processing chemicals. 316L. B = Good. Type 304 is only resistant to up to 3% acid at room temperature while type 316 is resistant to up to 20% acid at temperatures of up to 50 C. This suggests that type 304 is not suitable for use with sulfuric acid solutions. 304 is an excellent general grade of stainless steel. Alleima startpage Technical center Corrosion tables Sulphuric acid. Graph of 316L stainless steel weight loss by immersion in acid sulphate (H 2SO 4) at concentration 0.5 M in 1, 2 and 3 hours with temperature variations of 50 oC, 70 oC and 90 C. A concentration limit of 22% maximum at 20 . Moderate Effect, not recommended for continuous use. Softening, loss of strength, swelling, may occur. The chromium combines with oxygen to form chromium oxide (Cr2O3 - two atoms of chromium and three of oxygen, though there is another form of chromium oxide with one atom of chromium and one of oxygen). 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). SULFURIC ACID 75% to 93% Sulfuric Acid (H2SO4) is a very corrosive, very dense, oily liquid. D = Severe Effect, not recommended for ANY use. . 304 Stainless Steel Corrosion Compatibility Chart Chemical Compatibility Acetaldehyde A-Excellent Acetamide B-Good Acetate Solvent A-Excellent Acetic Acid D-Severe Effect Acetic Acid 20% B-Good Acetic Acid 80% D-Severe Effect Acetic Acid, Glacial C-Fair Acetic Anhydride B-Good The mill uses uninhibited 10 wt.% NH 2 HSO 3 at 65 C to clean the lime mud pressure filters. Type 317 may be used at temperatures as high as 150F (65C) with up to 5% concentration. Boletic Acid (fumaric acid) B Bone Oil (Dippel's oil) A Borax (sodium borate) A Boric Acid A Brake Fluid A Brewery Slop A Brine (salt water) B Bromic Acid, 3.1% D Bromine Gas, dry D 316L is preferred in many instances, particularly. Grade 316L is the low carbon version of SS 316. 316 Stainless St.) **(OK Fluorinated/TEST) Boric Acid BH3O3 A A to 140 A to 200 A to 212 A A A to 150 A to 175 A A to 5% to 70 A to 70 A to 200 A to 125 A to 185 A to 176 A A to 140 A to 70 A to 70 (Orthoboric Acid, Hydrogen Orthoborate) (10043-35-3) AB > 140 B > 185 AB > 176 AB 140-200 grades 304 and 316 is the addition of molybdenum, an alloy that drastically enhances corrosion resistance, especially for. Increasing amounts of chromium and molybdenum contents in stainless steel provide increasing resistance to reducing acids. Minor Effect, slight corrosion or discoloration. D = Severe Effect, not recommended for ANY use. The line is 316L stainless and injection quill is CPVC. These types of liners are designed to provide greater life expectancy in harsh environments. 302 Stainless Steel 304 Stainless Steel 316 Stainless Steel 440 Stainless Steel Aluminum TITANIUM NICKEL ALLOY C276 (HASTELLOY ) Cast Bronze Brass Cast Iron Carbon Steel POLYVINYLIDENE FLOURIDE (KYNAR ) PVC (Type 1) Tygon (E-3606) PTFE Polyphenylene Oxide (Noryl ) Polyacetal Nylon ABS (Cycolac) Polyethylene POLYPROPYLENE POLYPHENYLENE . Type 304 stainless steel contains 18% chromium and 8% nickel while Type 316 contains 16% chromium . B = Good. D = Severe Effect, not recommended for ANY use. Explanation of Footnotes 1. Minor Effect, slight corrosion or discoloration. Grade SS 904L is a non-stabilised low carbon high alloy austenitic stainless steel. Technical center. Type 304 is only resistant to up to 3% acid at room temperature while type 316 is resistant to up to 20% acid at temperatures of up to 50 C. This suggests that type 304 is not suitable for use with sulfuric acid solutions. in pharmaceutical, cosmetic, food and dairy applications. - Acid, sulphuric 70% to 90% H2SO4 above ambient temperature - Acid, oleum H2SO4 (Nordhousen, fuming sulphuric) . C. - No Data Aluminum Carbon Steel Cast/Ductile Iron 304 Stainless Steel 316 Stainless Steel Acetal Buna CSM (Hypalon) EPR, EPDM Fluorocarbon Fluoroelastomer (FKM) Geolast (Buna & . Although a passive layer forms naturally in alloys with a chromium content of between 10.5% and 12%, stainless steel equipment should be treated . Softening, loss of strength, or swelling may occur. 304 grade. Looking specifically at sulfuric acid, Type 316 is more protective. . Softening, loss of strength, swelling, may occur. Is 316 stainless steel suitable for Sulphuric acid? However, exact resistance levels will depend on the steel in use, concentration, and types of acid, and environmental temperature. The contact of carbon steel with concentrated sulfuric acid generates an immediate acid attack with the formation of hydrogen gas and ferrous ions, which, in turn, form a protective layer of FeSO 4 on the metallic surface. 5984,316, 6,161,838, and others, as well as foreign patents or products where patents are pending.Other patents pending. The information, materials and opinions provided by this Steel finder online tool are for general purposes only and are not intended to constitute professional advice or warranty of any kind. It's a silicon based nano-coating applied to stainless steel using chemical vapor deposition, giving it corrosion resistance at temperatures that PTFE can't handle, and at a fraction of the cost of a nickel based alloy. Alloy 20 - contains more nickel and chromium than 300 series stainless steel and with the addition of columbium that retards stress corrosion cracking and has improved resistance to sulfuric acid. All metals corrode to some degree in contact with sulphuric acid. The influence of NaCl on the corrosion of 316L SS was investigated. D = Severe Effect, not recommended for ANY use. Acetic Acid B D D D B D C C A - C - A D D C C D C B A C C B C Acetic Acid 20% B D D B A C C A A C B . B = Good, Minor Effect, slight corrosion or discoloration C = Fair, Moderate Effect, not recommended for continuous use. From the data of corrosion rate calculation to immersion with sulfuric acid 0.5 M for 1 Type 316 gives useful service at room temperature in sulphuric acid of concentrations lower than 15% wt. Temperature Conversion The addition increases corrosion resistance, particularly against chlorides and other industrial solvents. H2SO4 140 l l 25% and 50% 70 l l + 3% sulphuric acid 400 lll However, exact resistance levels will depend on the steel in use, concentration, and types of acid, and environmental temperature. 316 stainless steel is the most widely used material for pump heads, check valves, balls and other wetted components. It can range from colorless to dark brown depending on its purity and used in the manufacture a huge variety of substances including chemicals, fertilizers, paints, detergents, and explosives.
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