Electrochemical Investigations of the Resistance of Inconel 600, Incoloy 800, and Type 347 Stainless Steel to Pitting Corrosion in Faulted PWR Secondary Water at 150 to 250 C

CORROSION ◽  
1981 ◽  
Vol 37 (3) ◽  
pp. 147-152 ◽  
Author(s):  
J. Hickling ◽  
N. Wieling
Keyword(s):  
Stainless Steel ◽  
Pitting Corrosion ◽  
Inconel 600 ◽  
Incoloy 800

Hydrogen Gas Generation in Water Heat Pipes

1978 ◽  
Vol 100 (3) ◽  
pp. 313-318 ◽  
Author(s):  
G. F. Pittinato
Keyword(s):  
Stainless Steel ◽  
Heat Pipe ◽  
Heat Pipes ◽  
Hydrogen Gas ◽  
Gas Generation ◽  
Inconel 600 ◽  
430 Stainless Steel ◽  
Incoloy 800 ◽  
Isothermal Operation ◽  
Short Time

Water heat pipes were fabricated from 316, 347, and 430 stainless steel, Monel 400, CDA 715, Inconel 600, and Incoloy 800. All of these materials generated varying amounts of hydrogen gas during the first few days of operation. However, as the heat pipes continued to operate, the amount of gas in each heat pipe, excluding 430 stainless steel, decreased by permeating through the heat pipe walls. Inconel 600 appeared to be the most acceptable material for water heat pipes by returning to isothermal operation over a short time period. An equation based on a diffusion dependent mechanism was developed that predicts heat pipe performance recovery rates.

Stress Corrosion Cracking and Anodic Behavior of AISI 304 Stainless Steel, Inconel 600, and Incoloy 800 Straining in Boiling NaOH Solutions

CORROSION ◽  
1978 ◽  
Vol 34 (12) ◽  
pp. 413-418 ◽  
Author(s):  
Y. S. PARK ◽  
J. R. GALVELE ◽  
A. K. AGRAWAL ◽  
R. W. STAEHLE
Keyword(s):  
Stainless Steel ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Inconel 600 ◽  
Naoh Solution ◽  
Incoloy 800 ◽  
Electrode Technique

Abstract The straining electrode technique was used to evaluate the stress corrosion cracking (SCC) susceptibility of AISI 304 stainless steel in 20N NaOH solution, and of Inconel 600 Alloy and Incoloy 800 Alloy in boiling 17.5N NaOH solution. The crack propagation rate estimated from the straining experiments correlated well with failure time measurements from previous constant load experiments. It was found that the straining electrode technique is a useful method for estimating, through short term experiments, parameters like crack propagation rate, crack morphology, and repassivation rate, as a function of the electrode potential.

Selective Corrosion of brazed joint between BNi-2 filler metal and stainless steel 316

1996 ◽  
Vol 54 ◽  
pp. 218-219
Author(s):  
H. S. Kim ◽  
R. U. Lee
Keyword(s):  
Stainless Steel ◽  
Filler Metal ◽  
Surface Preparation ◽  
Optical Microscope ◽  
Heating Element ◽  
Incomplete Fusion ◽  
Atmospheric Conditions ◽  
Leak Test ◽  
High Temperature Side ◽  
Inconel 600

A heating element/electrical conduit assembly used in the Orbiter Maneuvering System failed a leak test during a routine refurbishment inspection. The conduit, approximately 100 mm in length and 12 mm in diameter, was fabricated from two tubes and braze-joined with a sleeve. The tube on the high temperature side (heating element side) and the sleeve were made of Inconel 600 and the other tube was stainless steel (SS) 316. For the filler metal, a Ni-Cr-B brazing alloy per AWS BNi-2, was used. A Helium leak test spotted the leak located at the joint between the sleeve and SS 316 tubing. This joint was dissected, mounted in a plastic mold, polished, and examined with an optical microscope. Debonding of the brazed surfaces was noticed, more pronounced toward the sleeve end which was exposed to uncontrolled atmospheric conditions intermittently. Initially, lack of wetting was suspected, presumably caused by inadequate surface preparation or incomplete fusion of the filler metal. However, this postulation was later discarded based upon the following observations: (1) The angle of wetting between the fillet and tube was small, an indication of adequate wetting, (2) the fillet did not exhibit a globular microstructure which would be an indication of insufficient melting of the filler metal, and (3) debonding was intermittent toward the midsection of the sleeve.

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.

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