The ‘appropriate grades’ notes are taken from the Avesta Sheffield Corrosion Handbook and are shown for general guidance only. Specific grade selection should be rechecked with corrosion tables. A link to the SST ORG web site article that describes where to find the corrosion tables on the Stainless steel tube corrosion can be found in the Related Links section of this article.
The table is referenced by the common name. Common Chemical NamesCommon nameChemical nameFormulaGrade selectionalumpotassium aluminiumsulphateKAl(SO4)2304 or 316 useful at all concentrations, up to 50Caqua fortisnitric acidHNO3Selection of stainless steels for handling nitric acid (HNO3)aqua regianitric and hydrochloric acid mixtureHNO3 and HClLikely to attack most stainless steel, This mixture is used for dissolving gold.bleachsodium hypochloriteNaOClSelection of stainless steels for handling sodium hypochlorite (NaOCl) – Bleachcaustic potashpotassium hydroxideKOHsimilar selection as for sodium hydroxidecaustic sodasodium hydroxideNaOHSelection of stainless steels for handling sodium hydroxide (NaOH)chromic acidchromium trioxideCrO3304 or 316 useful up to 40%, 20Cethanol (alcohol)ethyl alcoholC2H5OH304 or 316 useful at all concentrations, up to boiling pointglycolethylene glycol (anti-freeze preparations)C2H4(OH)2304 or 316 useful at all concentrations at ambient (or lower) temperaturesgypsumcalcium sulphateCaSO4304 or 316 useful at all concentrations, up to boiling pointJavelle (javel) watersodium hypochloriteNaOClSelection of stainless steels for handling sodium hypochlorite (NaOCl) – BleachLabarraque’s solutionsodium hypochloriteNaOClSelection of stainless steels for handling sodium hypochlorite (NaOCl) – Bleachmarine acidhydrochloric acidHClSelection of stainless steels for handling hydrochloric acid (HCl)methanol (alcohol)methyl alcoholCH3OH304 or 316 useful at all concentrations, up to boiling pointmuriatic acidhydrochloric acidHClSelection of stainless steels for handling hydrochloric acid (HCl)oil of vitriolsulphuric acidH2SO4Selection of stainless steels for handling sulphuric acid (H2SO4)oleumconcentated sulphuric acidH2SO4Selection of stainless steels for handling sulphuric acid (H2SO4)rock saltsodium chlorideNaClCrevice and pitting corrosionhazard with most stainless steels, depending on conditionssalt acidhydrochloric acidHClSelection of stainless steels for handling hydrochloric acid (HCl)spirit of salthydrochloric acidHClSelection of stainless steels for handling hydrochloric acid (HCl)sulphurated hydrogenhydrogen sulphideH2SCan be a pitting or stress corrosion cracking hazard to non-molybedum alloyed stainless gradeswood acidacetic acid (mainly)CH3COOHSelection of stainless steels for handling acetic acid (CH3COOH)
Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)
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