The common stainless steel types, 304 and 316 should be considered non-resistant to hydrochloric acid at any concentration and temperature. Corrosion Behavior of Corrosion Resistant Alloys in The selected steel pipes were a low alloyed steel, martensitic, supermartensitic, duplex 22 Cr, superduplex 25 Cr and superaustenitic stainless steels (25 Cr 35 Ni). Results obtained in the active acid environments over the temperature range of 100-140°C, showed that the blend acids with HCl at high concentration and HCl +HF represented too
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.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 arise due to poor material selection. HCL ACID AND STAINLESS STEEL TANKS - Chemical Aug 17, 2005 · 28 Jul 05 07:23. Hi, I am a bit concerned. My engineers are builing a Stainless steel (316) tank to hold highly concerntrated HCL acid. I believe we would be best to use other material as the potential to eat through the stainless welds is high. I would appreciate a bit of advise. Hydrochloric Acid - Rolled Alloys, Inc.Hydrochloric Acid. Hydrochloric acid (HCl) is a clear colorless liquid that is highly corrosive, and considered a strong mineral acid. The main applications of HCl are for pickling steel, acid treatment for oil wells, chemical cleaning, and chemical processing for large scale production of vinyl chloride.
The iso-corrosion chart below shows the relative corrosion resistance of several specialty alloys and exotic metals in various concentrations and temperature of hydrochloric acid (hydrogen chloride). Such alloys will typically be applied when stainless steel shows insufficent corrosion resistance in hydrochloric acid. Hydrochloric acid Sandvik Materials TechnologyHydrochloric 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). All concentrations are given in weight-% and the solvent is water if nothing Metals and Corrosion Resistance - Engineering ToolBoxCommon metals and their corrosion resistance to aggressive fluids like acids, bases and more. A major problem in process industry is corrosion of metals in pipes, valves and other parts of the constructions. Acceptable combinations of more or less aggressive fluids
Jun 13, 2015 · The selection of stainless steel 304 or stainless steel 316 types for applications involving prolonged contact, such as storage tanks, is not advisable. A concentration limit of 22% maximum at 20 degC can be taken for stainless steel 316, from the iso-corrosion diagram. Selection of stainless steels for handling sulphuric acid Hydrochloric acid (HCl) can be liberated from sodium chloride by sulphuric acid, depending on the temperature, making the mixture more aggressive. Influence of alloy additions to stainless steels on corrosion resistance. The improvement in corrosion resistance moving from 304 to 316 is due to the addition of molybdenum.Alloy selection for service in chlorine, hydrogen chloride Alloy selection for service in chlorine, hydrogen chloride and hydrochloric acid Table 1 con't Nominal composition of nickel-containing alloys used in Chlorine, Hydrogen Chloride and Hydrochloric Acid systems. Nominal composition, % ASTM Spec. b Alloy UNS Numbera Ni C Cr Mo Cu Fe Plate Seamless tube and pipe Austenitic Stainless Steels