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Metal Technology, Inc. 173 Queen Ave SE, Albany, Oregon 97322 U.S.A. 1-800-394-9979 |
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Corrosion Resistance of Molybdenum
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SUBSTANCE
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REACTION | |
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Air or Oxygen
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Beginning oxidation
at 400°C (750°F) Strong oxidation above 600°C (1110°F) Sublimation of MoO2 above 700°C (1300°F) |
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Ammonia
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Slight, but complete corrosion | |
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Aqueous Ammonia
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No Reation | |
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Aqua Regia
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Cold, dilute or concentrated:
no reaction warm, dilute or concentrated: rapid corrosion |
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Argon
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No reaction | |
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Boron
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Boride formation at high temperatures | |
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Bromine
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No reaction up to 450°C
(840°F) Reaction at red heat |
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Carbon or Hydrocarbon
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Carbide formation above 1100°C (2010°F) | |
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Carbon Dioxide
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Oxidation above 1200°C (2200°F) | |
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Carbon Monoxide
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Carbide formation above 1400°C (2550°F) | |
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Aqueous Caustic Soda
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No reaction | |
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Molten Caustic
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Slight reaction with
access to air Rapid dissolution in presence of oxidants (e.g. KNO3, KNO2, KCIO3, PbO2) |
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Chlorine
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Reaction above 300°C (570°F) | |
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Fluorine
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Room temperature; vigorous attack | |
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Helium
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No reaction | |
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Hydrochloric Acid
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Dilute and warm; rapid
corrosion Concentration: slow reaction |
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Hydrochloric-Sulphuric Acid
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Cold, dilute or concentrated; very slight reaction | |
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Hydrofluoric Acid
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Warm or Cold: no reaction | |
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Hydrofluoric Acid with Nitric Acid
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Warm or Cold; dissolves quickly | |
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Hydrogen
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No reaction up to maximum temperature | |
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Hydrogen Sulphide
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MoS2 forming at 1200°C (2200°F) | |
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Iodine
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No reaction up to 500°C (812°F) | |
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Nitric Acid
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Cold: slight reaction Warm: rapid attack |
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Nitric Oxide
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Oxidation to MoO3 at red heat | |
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Nitrogen
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No reaction up to maximum temperature | |
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Oxidizing Agents
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Molten KNO3, KNO2, Na2O2, K2CO3, Na2Co3, PBO2, KClO3 give fierce reaction | |
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Phosphorus
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No reaction up to maximum temperature | |
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Potassium or Sodium Hydroxide
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Cold aqueous solution:
no reaction Warm aqueous solution: slight reaction Molten: rapidly soluble |
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Silicon
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Silicide formation above 1100°C (2010°F) | |
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Sulphur
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Sulphide formation above 440°C (820°F) | |
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Sulphur Dioxide
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Oxidation to MoO2 | |
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Sulphuric Acid
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Dilute at 110°C
(230°F): slow corrosion Concentrated at 200°C (390°F): rapid |
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Water
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No attack | |
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Water vapor
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Rapid Oxidation at 700°C (1290°F) | |
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Molten Metals |
Molten: Strong attack | |
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Aluminum, Iron, Cobalt, Nickel, Tin, Zinc
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Molten: slight attack | |
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Lead, Cesium, Gallium, Potassium, Lithium,
Sodium, Magnesium, Mercury, Bismuth
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Molten: highly resistant | |
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Glass Melts
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Highly resistant | |
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Refractory Oxides (e.g. Al2O3)
BeO, MgO, ThO2, ZrO2 |
Up to 1700°C (3100°F): no attack | |
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| Home Corrosion Resistance Metals Custom Products Scientific & Laboratory Products About Us Contact Us Request a Quote Technical Inquiry form | |
|
Metal Technology, Inc. 173 Queen Ave SE, Albany, Oregon 97322 U.S.A. 1-800-394-9979 |
|