Thermogravimetric Thin Aqueous Film Corrosion Studies of Alloy 22; Calcium Chloride Solutions at 150°C and Atmospheric Pressure

2002 ◽  
Vol 757 ◽  
Author(s):  
Phillip Hailey ◽  
Greg Gdowski
Keyword(s):  
Weight Loss ◽  
Calcium Chloride ◽  
Specimen Surface ◽  
Tungsten Alloy ◽  
Corrosion Resistant ◽  
Nickel Chromium ◽  
Corrosion Studies ◽  
Alloy 22 ◽  
Post Test

ABSTRACTThe extent of reaction of alloy 22 with limited amounts of aqueous calcium chloride (CaCl2) was investigated. Alloy 22 is a highly corrosion-resistant nickel-chromium-molybdenum-tungsten alloy. Specimens were polished to a mirror finish prior to aerosol salt deposition. An aqueous film was formed on the specimen surface by deliquescence of deposited CaCl2 at 150°C and 22.5% relative humidity (RH). The reactant gas was a continuous flow of purified humidified laboratory air. The reaction progress as a function of time was continuously measured in-situ by a microbalance. An initial weight gain due to CaCl2 deliquescence was observed. A steady weight loss was observed over the next 24 hours, after which no further weight change was apparent. During the period of weight loss, white precipitates formed and the specimen surface became visibly dry. Post-test analyses indicated that the precipitates consisted of calcium, chloride, and oxygen.

scholarly journals Passive Corrosion Behavior of Alloy 22 in Multi-Ionic Aqueous Environments

2002 ◽  
Author(s):  
Tiangan Lian ◽  
John C. Estill ◽  
Gary A. Hust ◽  
Dave V. Fix ◽  
Raul B. Rebak
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Yucca Mountain ◽  
Corrosion Studies ◽  
Alloy 22 ◽  
Aqueous Environments ◽  
Geological Repository ◽  
High Level Nuclear Waste ◽  
Alternative Techniques ◽  
High Level

As part of proposed geological repository at Yucca Mountain, Nevada, Alloy 22 (Ni-22Cr-13Mo-3W-3Fe) has been chosen as the candidate material for a 2-cm outer layer on the high-level nuclear waste containers. During the repository period, the container materials will be subject to corrosion due to their exposure to multi-ionic aqueous environments. Although Alloy 22 has demonstrated excellent corrosion resistance, accumulation of a small, yearly corrosion rate for 10,000 or more years can be significant. When subjected to the conventional weight loss technique for corrosion studies, Alloy 22 requires many years to demonstrate a detectible weight loss. The goal of this research is to seek alternative techniques to determine a reasonably confident corrosion rate. This paper will discuss the latest experimental results using the potentiostatic technique to determine passive dissolution rates.

INCONEL ALLOY 22

Alloy Digest ◽  
2005 ◽  
Vol 54 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Pitting Corrosion ◽  
Corrosion Resistant ◽  
Inconel Alloy ◽  
Resistant Alloy ◽  
Alloy 22 ◽  
Corrosion Resistant Alloy

Abstract Inconel alloy 22 is an advanced corrosion-resistant alloy with exceptional resistance to aqueous and pitting corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as joining. Filing Code: Ni-624. Producer or source: Special Metals Corporation.

NIMROD C22KS

Alloy Digest ◽  
2002 ◽  
Vol 51 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Properties ◽  
Heat Treating ◽  
Nominal Composition ◽  
Corrosion Resistant ◽  
Nickel Chromium

Abstract Nimrod C22KS is a nickel-chromium-molybdenum-tungsten type consumable with a nominal composition of Ni, 22% Cr, 13.5% Mo, and 3% W and is used to join high-molybdenum corrosion-resistant alloys to themselves and each other. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on heat treating and joining. Filing Code: Ni-588. Producer or source: Metrode Products Ltd.

CARLSON 330

Alloy Digest ◽  
1992 ◽  
Vol 41 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Temperature Strength ◽  
Corrosion Resistant ◽  
Nickel Chromium ◽  
Resistance To Oxidation ◽  
Chromium Stainless Steel

Abstract Carlson Alloy 330 is a heat and corrosion resistant austenitic nickel chromium stainless steel. It has good high temperature strength combined with resistance to oxidation and carburization. The alloy is popular in the heat treating industry. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on forming, heat treating, and joining. Filing Code: SS-537. Producer or source: G.O. Carlson Inc..

In-situ growth of cerium nanoparticles for chrome-free, corrosion resistant anodic coatings

2021 ◽  
Vol 410 ◽  
pp. 126958
Author(s):  
Linnea Selegård ◽  
Thirza Poot ◽  
Peter Eriksson ◽  
Justinas Palisaitis ◽  
Per O.Å. Persson ◽  
...  
Keyword(s):  
In Situ Growth ◽  
Corrosion Resistant

Anodic synthesis of TiO2 nanotubes by step-up voltages

2021 ◽  
pp. 002199832110237
Author(s):  
V Sivaprakash ◽  
R Narayanan
Keyword(s):  
Corrosion Resistance ◽  
Tio2 Nanotubes ◽  
Biomedical Applications ◽  
Phase Changes ◽  
Electrochemical Anodization ◽  
Corrosion Resistant ◽  
Anodization Process ◽  
Anodic Synthesis ◽  
Input Potential

Fabrication of TiO2 nanotubes (NTs) has extensive application properties due to their high corrosion resistant and compatibility with biomedical applications, the synthesis of TiO2 nanotubes over titanium has drawn interest in various fields. The synthesis of TiO2 NTs using novel in-situ step-up voltage conditions in the electrochemical anodization process is recorded in this work. For manufacturing the NTs at 1 hour of anodization, the input potential of 30, 40 and 50 V was selected. With increasing step-up voltage during the anodization process, an improvement in the NTs was observed, favoring corrosion resistance properties. The surface of NTs enhances the structure of the ribs, raising the potential for feedback over time. XRD was used to analyze phase changes, and HR-SEM analyzed surface topography. Impedance tests found that longer NTs improved the corrosion resistance.

Crevice Corrosion Studies on Corrosion Resistant Alloys in Stagnant Natural Seawater

2012 ◽  
Vol 610-613 ◽  
pp. 276-279
Author(s):  
Laura L. Machuca ◽  
Stuart I. Bailey ◽  
Rolf Gubner
Keyword(s):  
Crevice Corrosion ◽  
Corrosion Potential ◽  
Natural Seawater ◽  
Corrosion Resistant ◽  
Testing Procedures ◽  
Corrosion Studies ◽  
Long Term Performance ◽  
Term Performance ◽  
Positive Effect

Crevice corrosion (CC) was investigated for a number of selected corrosion resistant alloys in natural seawater containing microorganisms for up to 18 months under stagnant conditions. Experimental controls consisted of tests in natural seawater filtered in accordance with hydrostatic testing procedures. The corrosion potential of alloys was monitored throughout exposure and corrosion was evaluated by weight loss and 3D optical microscopy. CC was initiated on several alloys and corrosion rates in time indicated a positive effect of seawater filtration on the long-term performance of the alloys. Microbial adhesion, as indicated by fluorescence microscopy, occurred mainly outside the crevice and differed according to the nature of the substratum surface.

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