Action of Carbon in Stress Corrosion Cracking of Mild Steel in Nitrate Solutions

CORROSION ◽  
1973 ◽  
Vol 29 (1) ◽  
pp. 37-46 ◽  
Author(s):  
J. FLIS
Keyword(s):  
Carbon Content ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Intergranular Corrosion ◽  
Corrosion Cracking ◽  
Total Carbon ◽  
General Corrosion ◽  
Low Carbon ◽  
Total Carbon Content ◽  
Protective Properties

Abstract The effect of total carbon content on susceptibility of iron to stress corrosion cracking (SCC), on the depth of intergranular corrosion without stresses, anodic polarization curves, and the general corrosion rate was examined on decarburized Armco iron and its ferritic or martensitic alloys with carbon up to 1.4% in 5N NH4NO3 and 5N Ca(NO3)2, pH 5.0, at 75 and 100 C (167 and 212 F). The susceptibility to SCC and intergranular corrosion increased with the carbon content increasing up to about 0.009% or above, and it diminished with further increase in the carbon content. Carbon decreased the ability of iron to passivate (depassivating action), but it also promoted deposition of magnetite and enhanced its protective properties (impeding action). It is suggested that the observed effect of carbon on SCC and intergranular corrosion results from the predominance of the depassivating action at low carbon contents, and the predominance of the impeding action at higher carbon contents.

CARLSON ALLOY 904L

Alloy Digest ◽  
2002 ◽  
Vol 51 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Carbon Content ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Intergranular Corrosion ◽  
Crevice Corrosion ◽  
Heat Treating ◽  
Low Carbon ◽  
Wide Range

Abstract Carlson Alloy 904L is a 21Cr-24Ni-4.5Mo-1.5Cu low-carbon austenitic alloy that resists corrosion in a wide range of both oxidizing and reducing environments. It has good pitting and crevice-corrosion resistance and eliminates stress-corrosion cracking in most common chloride environments. The alloy resists intergranular corrosion in postwelded or stress-relieved conditions because of its very low carbon content. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-844. Producer or source: G.O. Carlson Inc.

scholarly journals CRACKING CORROSION OF LOW CARBON STEEL IN ENVIRONMENT WITH A HIGH CONCENTRATION OF CO2 AND H2S

2018 ◽  
Vol 55 (5B) ◽  
pp. 210
Author(s):  
Nguyen Thi Le Hien
Keyword(s):  
Carbon Steel ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Low Carbon Steel ◽  
Corrosion Cracking ◽  
Test Method ◽  
General Corrosion ◽  
Low Carbon ◽  
Hydrogen Induced Cracking ◽  
Sulfide Stress

Cracking corrosion of API 5CT Grade L80 Type 1 low carbon steel has been studied in a in brine solutions with H2S 12.3 psia and CO2 9.4 psia. Testing was performed according to the methodology reference from the NACE TM0177, Bent-beam test method in solution B for stress corrosion cracking and sulfide stress corrosion cracking test and NACE TM0284, immersion test method in solution A for Hydrogen induced cracking test.The obtained results showed pitting and general corrosion at both temperatures of 24 oC and 82 oC. In case of stress corrosion cracking (SCC) testing at 82 °C, microscopy of the samples tested for 30 days developed pitting corrosion in the surface and cracking starting in the surface of the samples. The cracks, mostly found in the middle of the samples where the maximum bending occurred. General corrosion was also observed in the samples, with significant decrease in the dimensions of the samples after testing (due to general corrosion). However, in case of sulfide stress corrosion (SSC) and hydrogen induced cracking (HIC) tests at room temperature (24-25 oC), no cracking was observed on the sample. 

NICROFER 5716 HMoW

Alloy Digest ◽  
1985 ◽  
Vol 34 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Stress Corrosion ◽  
Tensile Properties ◽  
Stress Corrosion Cracking ◽  
Crevice Corrosion ◽  
Corrosion Cracking ◽  
Low Carbon ◽  
Nickel Chromium ◽  
Corrosion Pitting

Abstract NICROFER 5716 HMoW is a nickel-chromium-molybdenum alloy with tungsten and extremely low carbon and silicon contents. It has excellent resistance to crevice corrosion, pitting and stress-corrosion cracking. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, machining, and joining. Filing Code: Ni-324. Producer or source: Vereingte Deutsche Metallwerke AG.

Influence of Malonic Acid on the Corrosion and SCC Behaviour of Anodic Coated 1050 Al-Alloys

2010 ◽  
Vol 438 ◽  
pp. 155-162 ◽  
Author(s):  
Panayotis Spathis ◽  
Efthimios Papastergiadis ◽  
Georgios Stalidis ◽  
Georgios Papanastasiou
Keyword(s):  
Stress Corrosion ◽  
Acid Concentration ◽  
Malonic Acid ◽  
Stress Level ◽  
Current Density ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Al Alloy ◽  
Applied Potential ◽  
Protective Properties

Aim of the present work is the study of corrosion and stress corrosion cracking behaviour of 1050 Al-Alloy anodised in a 3M H2SO4 anodising bath with the presence in it of malonic acid, in various concentrations and anodising current densities. The investigation was carried out by SCC (Stress Corrosion Cracking) tests and electrochemical measurements. The influence of applied potential on SCC behaviour was also examined. The corrosion and SCC behaviour of anodised 1050 Al-Alloy was found to vary with malonic acid concentration, anodising conditions, applied potential and stress level. In SCC conditions all prepared coatings protected the bare alloy, with better protective properties in the case of 0.015M concentration of malonic acid prepared with a 6 A.dm-2 anodising current density. The coating prepared in these conditions had better mechanical properties as indicated from the increased protection at a high stress level and also the better behaviour in corrosion, without stress, conditions of coatings prepared in different conditions of malonic acid concentration and anodising current density. For the interpretation of the results, properties of the anodic coatings as thickness, packing density, coating ratio, roughness, were also studied. The anodic coating formed in a electrolytic bath of 0.015M concentration of malonic acid and a 6 A.dm-2 anodising current density was found to be less porous, more compact and rough, with better oxide structure. Prepared coatings were found to increase protective properties in an area of applied potentials slightly more anodic than the free corrosion potential values.

scholarly journals Intergranular Corrosion and Stress Corrosion Cracking of Cold-Rolled Zircaloy-2.

1994 ◽  
Vol 43 (488) ◽  
pp. 551-555
Author(s):  
Hitoshi UCHIDA ◽  
Shozo INOUE ◽  
Kazuyuki MORIMOTO ◽  
Keiji KOTERAZAWA
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Intergranular Corrosion ◽  
Corrosion Cracking ◽  
Cold Rolled

Susceptibility to Stress Corrosion Cracking for Low-Carbon Steel Welds in Carbonate-Bicarbonate Solution

CORROSION ◽  
2008 ◽  
Vol 64 (12) ◽  
pp. 939-948 ◽  
Author(s):  
H. Mitsui ◽  
R. Takahashi ◽  
H. Asano ◽  
N. Taniguchi ◽  
M. Yui
Keyword(s):  
Carbon Steel ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Low Carbon Steel ◽  
Corrosion Cracking ◽  
Low Carbon ◽  
Steel Welds
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