A Model for High-Temperature Pitting Corrosion in Nickel-Based Alloys Involving Internal Precipitation of Carbides, Oxides, and Graphite

2008 ◽  
Vol 39 (6) ◽  
pp. 1258-1276 ◽  
Author(s):  
J.Z. Albertsen ◽  
Ø. Grong ◽  
J.C. Walmsley ◽  
R.H. Mathiesen ◽  
W. Van Beek
Keyword(s):  
High Temperature ◽  
Pitting Corrosion ◽  
Internal Precipitation

NIROSTA 4429

Alloy Digest ◽  
2000 ◽  
Vol 49 (5) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Pitting Corrosion ◽  
Intergranular Corrosion ◽  
Heat Treating ◽  
Low Carbon ◽  
High Nitrogen ◽  
Temperature Performance ◽  
Pitting Corrosion Resistance

Abstract Nirosta 4429 is a low-carbon, high-nitrogen version of type 316 stainless steel. The low carbon imparts intergranular corrosion resistance while the nitrogen imparts both higher strength and some increased pitting corrosion resistance. It is recommended for use as welded parts that need not or cannot be annealed after welding. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-787. Producer or source: ThyssenKrupp Nirosta.

Pitting Corrosion of Inconel 600 in High-Temperature Water Containing CuCl2

CORROSION ◽  
1985 ◽  
Vol 41 (11) ◽  
pp. 665-675 ◽  
Author(s):  
J. R. Park ◽  
Z. Szklarska-Smialowska
Keyword(s):  
High Temperature ◽  
Pitting Corrosion ◽  
Chloride Ion ◽  
Open Circuit ◽  
Cupric Chloride ◽  
Corrosion Products ◽  
Chloride Solutions ◽  
Inconel 600 ◽  
High Temperature Water ◽  
Temperature Water

Abstract Pitting corrosion of Inconel 600 was studied in aqueous sodium and cupric chloride solutions at 60 and 280 C. The pit nucleation potential, Enp, was evaluated in two different concentrations of sodium chloride. Enp decreased with increasing concentrations of the chloride ion and with temperature. On specimen surfaces exposed to cupric chloride solutions, pitting occurred at open circuit potentials nearly equal to or higher than the Enp determined by anodic polarization in 0.01 M NaCl solution. The number and size of the pits increased with increasing concentrations of cupric chloride and dissolved oxygen. On specimens partly covered with polytetrafluorethylene (PTFE) tape (i.e., in the presence of artificial crevices), pitting occurred more easily at low concentrations of CuCl2 (≤ 20 ppm CuCl2 in deaerated solutions at 280 C). Tubes covered with oxide films that formed during the operation of model boilers exhibited greater pitting resistance than tubes with clean surfaces at 280 C, but less resistance at 60 C. Corrosion products contained in the pits were enriched in chromium with small amounts of copper, sulfur, and chlorine. The composition of corrosion products covering the pits was similar to that in the pits, but with the additional enrichment of iron. Presumably, sulfur present in Inconel 600 as an impurity was significant in the pitting process. The probable mechanism of the processes leading to pitting of Inconel 600 tubing in high-temperature water is discussed.

SANDVIK 3R64

Alloy Digest ◽  
1997 ◽  
Vol 46 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Pitting Corrosion ◽  
Heat Treating ◽  
Temperature Performance ◽  
Pitting Corrosion Resistance ◽  
Type 316L

Abstract Sandvik 3R64 is an austenitic stainless steel with a high molybdenum content. Significant properties are improved general and pitting corrosion resistance in comparison with Type 316L. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-686. Producer or source: Sandvik.

Investigation on the Compatibility of Fe-Ni Magnetic Alloy With High Temperature Sodium

2013 ◽  
Author(s):  
Jin-quan Zhang ◽  
Pei-de Zhou ◽  
Yong-li Xu ◽  
Chun Xie ◽  
Xiao-gang Fu ◽  
...  
Keyword(s):  
Weight Gain ◽  
High Temperature ◽  
Oxide Scale ◽  
Pitting Corrosion ◽  
Scale Formation ◽  
Average Weight ◽  
Magnetic Alloy ◽  
Intergranular Attack ◽  
Test Conditions ◽  
Average Weight Gain

This paper presents the study of the compatibility of Fe-Ni magnetic alloy in high temperature sodium. After test, some detections were performed. The weight of all samples increased slightly after test, and the average weight gain increased as the temperature risen; Some Mn compounds and Cu were observed on the interface of steel with sodium, but there no pitting corrosion and intergranular attack were observed; There was no oxide scale formation on the surface of samples. The materials showed well compatibility with sodium under test conditions.

ALZ 316LNHMo

Alloy Digest ◽  
2002 ◽  
Vol 51 (1) ◽  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Pitting Corrosion ◽  
Heat Treating ◽  
Low Carbon ◽  
Temperature Performance ◽  
Corrosion Risk

Abstract ALZ 316LNHMo is an austenitic stainless steel with good formability, corrosion resistance, toughness, and good mechanical properties. This grade is nitrogen strengthened with a low carbon content, which improves the resistance to intergranular corrosion in welds and slower-cooled sections. The enhanced addition of molybdenum renders this steel particularly suitable for use in environments that have a high pitting corrosion risk. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SS-839. Producer or source: ALZ nv.

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