Technical Information

Refractory Metals Corrosion Resistance Guide

  Capternter 20 (High-Nickel Stainless Steel) Columbium Hastelloy C-276 (Nickel-Chromium-Molybdenum) Hastelloy B-2 (Nickel-Molybdenum) Monel No. 400 (Nickel-Copper) Stainless Steel 316 Tantaulm Titanium Zirconium
Acetic acid, 50%, boiling 1 1 1 1 1,2 1 1 1 1
Aluminum chloride, 5% 1 1 1 1 1,2 3 1 1 4
Ammonium chloride, 50% 1 1 1 4 1,2 1# 1 4 1
Ammonium sulfate, saturated, boiling 1 4 2 1 1,2 1# 1 4 4
Bromine, dry 1 4 2 1 1,2 1# 1 4 4
Bromine, water 1, 2 1 1 3 3 3 1 4 4
Caustic soda 1 3 1 1 1 1 3 4 4
Chlorine gas, dry, 25°C 1 1 1 1 1 3 1 3 2
Chlorine gas, moist, 25°C 3 1 1 3 4 3 1 1 3
Chlorine gas, moist, 100°C 3 1 3 3 3 3 1 1 3
Chlorosulfonic acid, 10% 3 4 1 1 1,2 3 1 4 4
Chromium-plating bath 1, 2 4 4 4 3 1,2 1 4 4
Ferric chloride, 5% agitated 3 1 1 3 4 3 1 1 3
Flue gas 1, 2 4 1 2 4 1,2 1 4 4
Flourine 2, 3 3 4 4 1 3 3 4 4
Hydrochloric acid, 38°C
(all concentrations)
3 2 1 1 4 3 1 3 1
Hydrogen peroxide, 25°C 1 2 1 2 1,2 1* 1 1 1
Lead, molten 4 4 1 1 3 3 1 4 4
Mine water, acid 1 4 1 1 3 1# 1 4 4
Nitric acid, 5%, 25°C 1 1 1 3 3 1 1 1 1
Nitric acid, conc., boiling 1 1 3 3 4 2 1 1 1
Potassium cyanide 1 4 1 1 1,2 1 1 4 4
Sodium chloride, sat., boiling 1 4 1 1 1 1# 1 1 4
Sodium hypochlorite, 5%, 25°C 2 3 1 3 3 1# 4 2 2
Sulfur dioxide, moist 25°C 1 1 1 3 3 1 1 1 4
Sulfuric acid, 5%, 25°C 1 1 1 1 1,2 2 1 2 1
Sulfuric acid, 50%, boiling 2, 3 3 3 1 3 3 1 3 1

# Subject to pitting at air line or when allowed to dry
* Attack may occur when sulfuric acid is also present


1: Fully resistant
2: Some attack
3: Unsatisfactory
4: No data available

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