AUTOCLAVE TESTING OF MONEL, NICKEL AND INCONEL

Technical Report · Sun Oct 01 04:00:00 EDT 1961

OSTI ID:4813943

McGrew, J; Frank, S; Page, T

BS>Stressed and unstressed specimens of Monel, nickel, and Inconel were exposed to varied environmental conditions to test the resistance of these three metals to corrosion. The experiments were conducted in autoclaves operated at 450 deg F and 422 psia for 50, 200, and 2000 hours. The environmental conditions included variations in concentration of chloride, oxygen, phase (liquid or vapor) and method of pH adjustment. Statistical methods were employed in designing the experiments and in analyzing the results. An incipient surface dulling was noted on some of the specimens that were tested for 50 and 200 hours, but none of the specimens cracked or pitted. No cracking of any coupons was observed in the 2000- hour autoclave tests, but varying degrees of pitting did occur for all three metals. Typical corrosion rates from the 2000-hour data for coupons exposed to l000 ppm chloride and l5 ppm oxygen were: Monel, 0.50 mdd; nickel, 0.38 mdd; and Inconel, 0.02 mdd. Based on the results of these tests, the materials are listed in order of preference as follows: Inconel, nickel, and Monel. (auth)

• Research Organization: Martin Co. Nuclear Div., Baltimore
• NSA Number: NSA-16-005668
• OSTI ID: 4813943
• Report Number(s): MND-E-2655
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
AUTOCLAVES
CHLORIDES
COPPER ALLOYS
CORROSION
LIQUIDS
MATERIALS TESTING
METALS, CERAMICS, AND OTHER MATERIALS
NICKEL
NICKEL ALLOYS
OXYGEN
PRESSURE VESSELS
STATISTICS
STRESSES
VAPORS