Discussion of “Numerical Simulation of Crevice Corrosion of Stainless Steels and Nickel Alloys in Chloride Solutions”

CORROSION ◽  
1991 ◽  
Vol 47 (8) ◽  
pp. 590-591 ◽  
Author(s):  
J. L. Crolet
Keyword(s):  
Numerical Simulation ◽  
Stainless Steels ◽  
Crevice Corrosion ◽  
Nickel Alloys ◽  
Chloride Solutions

A Short Duration Test Method for Prediction of Crevice Corrosion Rates on Stainless Steels

CORROSION ◽  
1978 ◽  
Vol 34 (12) ◽  
pp. 419-424 ◽  
Author(s):  
JOHN M. DRUGLI ◽  
EINAR BARDAL
Keyword(s):  
Free Surface ◽  
Short Duration ◽  
Stainless Steels ◽  
Crevice Corrosion ◽  
Test Method ◽  
Corrosion Properties ◽  
Chloride Solutions ◽  
Long Duration ◽  
Good Agreement

Abstract The aim of the present work has been to develop a short duration test method by which it is possible to: (1) determine the necessary conditions for crevice corrosion, and (2) predict the corrosion rate in active crevices for different area ratios between free surface and crevice. The method consists of determination of cathodic and anodic polarization curves on separate cathode (free surface) and anode (crevice) specimens, respectively, by certain applied procedures. The results from short duration tests on three different stainless steels in chloride solutions have been compared with results from long duration tests, and fairly good agreement has been found. It is thought that the short duration method can be applied for determination of the most significant crevice corrosion properties. With minor adjustments, the method is also applicable for aluminum alloys in chloride solutions.

Condenser Tube Materials for Seawater Service

1966 ◽  
Vol 88 (4) ◽  
pp. 410-414 ◽  
Author(s):  
R. B. Niederberger
Keyword(s):  
Stainless Steels ◽  
Crevice Corrosion ◽  
Nickel Alloys ◽  
Maximum Velocity ◽  
Condenser Tube ◽  
Copper Nickel

The results of a series of investigations to assess the performance of a variety of alloys in small experimental condenser configurations at seawater velocities of 10 to 20 fps are summarized. They demonstrate that the addition of 1 percent aluminum increases the maximum velocity limits of copper-nickel alloys to 12–15 fps. Stainless steels, nickel alloys, and titanium are satisfactory for use at velocities of 20 fps, but many of these would be susceptible to pitting and/or crevice corrosion under stagnant conditions.

Effects of Thermal Oxidation and Subsequent Pickling on Pitting Geometry of Austentitic Stainless Steels in Chloride Solutions

2011 ◽  
Vol 53 (10) ◽  
pp. 634-638 ◽  
Author(s):  
Vesna Alar ◽  
Ivan Esih ◽  
Ivan Budic ◽  
Slavonski Brod
Keyword(s):  
Thermal Oxidation ◽  
Stainless Steels ◽  
Chloride Solutions

REMANIT 4439

Alloy Digest ◽  
1993 ◽  
Vol 42 (11) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Stainless Steels ◽  
Crevice Corrosion ◽  
Heat Treating ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Low Carbon ◽  
Corrosion Resistant ◽  
Mechanical Properties And Corrosion

Abstract REMANIT 4439 is a highly corrosion resistant steel with low carbon content, an addition of nitrogen to enhance both mechanical properties and corrosion resistance, and higher molybdenum than most stainless steels to resist pitting and crevice corrosion in chloride media. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-556. Producer or source: Thyssen Stahl AG.

Detecting Critical Crevice Temperature for Duplex Stainless Steels in Chloride Solutions

CORROSION ◽  
2011 ◽  
Vol 67 (2) ◽  
pp. 025004-1-025004-7 ◽  
Author(s):  
D. Han ◽  
Y. Jiang ◽  
B. Deng ◽  
L. Zhang ◽  
J. Gao ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Crevice Corrosion ◽  
Electrochemical Method ◽  
Duplex Stainless Steels ◽  
Good Reproducibility ◽  
X Ray ◽  
Initiation Step ◽  
Critical Pitting Temperature ◽  
Preferential Dissolution ◽  
Scanning Electron

Abstract A simple and rapid electrochemical method for the evaluation of crevice corrosion in duplex stainless steels (DSS) is described. Three types of DSS—namely, UNS S32101, UNS S31803, and UNS S32750—were tested in 1 mol/L sodium chloride (NaCl) solutions. Results showed good reproducibility with a typical standard deviation of below 3°C. The critical pitting temperature (CPT) for the same specimens was also investigated in 1 mol/L NaCl solutions. An approximately 20°C decrease from CPT to critical crevice temperature (CCT) was observed and subsequently explained. Then, the morphologies of crevice corrosion were studied using scanning electron microscopy with energy-dispersive x-ray spectroscopy (SEM/EDS) method. The SEM/EDS study revealed that the ferrite phase was the site where preferential dissolution took place at the initiation step of crevice corrosion, which was in accordance with the prediction by calculating the critical crevice index. Moreover, repassivation was detected with the development of crevice corrosion. The reason was clarified by combining the results obtained with a successful diffusion model, and eventually the crevice corrosion progress was illustrated schematically.

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