The Corrosion Behavior of High Purity Mg According to Process History

Abstract Chemical and galvanic corrosion experiments at 35 C show that ductile vanadium is resistant to corrosion in substitute ocean water. It is also resistant in 60 percent sulfuric and 20 percent hydrochloric acids but corrodes rapidly in nitric acid solutions. Vanadium is less noble than stainless steel and copper and more noble than aluminum, magnesium and steel (SAE 4130) in substitute ocean water. 6.3.18

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Corrosion Behavior of Ceramics in High Purity Water at 290°C

Journal of the Society of Materials Science Japan ◽

10.2472/jsms.38.300 ◽

1989 ◽

Vol 38 (426) ◽

pp. 300-306 ◽

Cited By ~ 9

Author(s):

Takashi KAWAKUBO ◽

Hideo HIRAYAMA ◽

Akira GOTO ◽

Tadashi KANEKO

Keyword(s):

Corrosion Behavior ◽

High Purity

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Influence of Impurities on Intergranular Corrosion of Extra High Purity Austenitic Stainless Steels

Volume 1: Plant Operations, Maintenance, Engineering, Modifications and Life Cycle; Component Reliability and Materials Issues; Next Generation Systems ◽

10.1115/icone17-75531 ◽

2009 ◽

Author(s):

Ikuo Ioka ◽

Jun Suzuki ◽

Takafumi Motoka ◽

Kiyoshi Kiuchi ◽

Junpei Nakayama

Keyword(s):

Corrosion Rate ◽

Corrosion Behavior ◽

Stainless Steels ◽

High Purity ◽

Intergranular Corrosion ◽

Active Sites ◽

Degradation Mechanism ◽

Austenitic Stainless Steels ◽

Hno3 Solution ◽

Nuclear Fuel Reprocessing Plant

An intergranular corrosion is observed in austenitic stainless steels exposed to high temperature, concentrated nitric acid (HNO3) solution with highly oxidizing ions. It is an important degradation mechanism of austenitic stainless steels for use in a nuclear fuel reprocessing plant. The intergranular corrosion is caused by the segregation of impurities to grain boundaries and the resultant formation of active sites. Extra High Purity (EHP™) austenitic stainless steel was developed with conducting the new multiple refined melting in order to suppress the total harmful impurities less than 100ppm. The intergranular corrosion behavior of EHP alloys with various impurities was examined in boiling HNO3 solution with highly oxidizing ions to find a correlation between the intergranular corrosion and the impurities of EHP alloys. A good correlation was confirmed between the degree of intergranular corrosion and the corrosion rate. The relationships between the corrosion rate and the impurities content of EHP alloys was determined using a multiple regression analysis. The influence on corrosion rate became small in order of B, P, Si, C, S and Mn. It was important to control B in intergranular corrosion behavior of EHP alloys.

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Deformation and Corrosion Behavior of a High Purity Manganese Free AZ31 Magnesium Alloy

Advanced Materials Research - Advanced Materials and Processing ◽

10.4028/0-87849-463-4.1283 ◽

2007 ◽

pp. 1283-1286

Author(s):

Eigo Kakutani ◽

Masahiro Jotoku ◽

Atsushi Yamamoto ◽

Harushige Tsubakino

Keyword(s):

Magnesium Alloy ◽

Corrosion Behavior ◽

High Purity ◽

Az31 Magnesium Alloy

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A Study of Localized Corrosion in Al Resulting From The Controlled Introduction of Cl

MRS Proceedings ◽

10.1557/proc-781-z2.9 ◽

2003 ◽

Vol 781 ◽

Author(s):

C. M. Johnson ◽

F. D. Wall ◽

J. C. Barbour ◽

M. A. Martinez

Keyword(s):

Electron Microscopy ◽

Corrosion Behavior ◽

High Purity ◽

Localized Corrosion ◽

High Magnification ◽

Sem Images ◽

Optical And Electron Microscopy ◽

Pit Nucleation ◽

Microscopy Images

AbstractHigh purity Al samples were implanted with 35 keV Cl+ then polarized in Cl--free electrolyte in order to ascertain corrosion behavior as a function of Cl content. Electrochemical data indicated implant fluences between 5x1015 and 2x1016 Cl+cm-2 resulted in little or no localized attack. Implant fluences of 3x1016 and 5x1016 Cl+cm-2 resulted in significant attack with the severity scaling as a function of implant fluence. The low variability in the behavior of localized corrosion for the 5x1016 Cl+cm-2 sample suggests that this implant dosage may result in a critical Cl- in the sample for pit nucleation. Optical and Electron microscopy images indicated some reactivity associated with lower fluences (1x1016Cl+cm-2), possibly indicating enhanced general dissolution. At high magnification the corrosion was observed to occur outside the implanted boundary through mechanisms of tunneling or altered local chemistry at those sites. The SEM images reveal a form of localized corrosion with a crystalline character.

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Influence of Silicon and Manganese on Corrosion Behavior of Austenitic Stainless Steels

CORROSION ◽

10.5006/0010-9312-24.12.393 ◽

1968 ◽

Vol 24 (12) ◽

pp. 393-402 ◽

Cited By ~ 15

Author(s):

B. E. WILDE ◽

J. S. ARMIJO

Keyword(s):

Steady State ◽

Corrosion Rate ◽

Corrosion Behavior ◽

Stainless Steels ◽

High Purity ◽

Composition Range ◽

Austenitic Stainless Steels ◽

Dissolution Kinetics ◽

Kinetics Of ◽

Partial Process

Abstract The influence of silicon and manganese on the electrochemical and corrosion behavior of a high purity austenitic 14Cr/14Ni-balance Fe alloy has been studied. Over the composition range 50–41, 500 ppm Si, no effect was observed on the kinetics of the anodic or cathodic partial processes. Addition of manganese over the range 5–26,300 ppm accelerates the anodic dissolution kinetics in the active range of potentials and also the steady-state corrosion rate in 1N̄ H2SO4 due to its influence on the kinetics of the cathodic partial process. The nature of this effect is analyzed according to electrode kinetic concepts from which it is shown that manganese changes the value of the electrode process transmission coefficient. Alloys containing manganese and silicon over large concentration ranges are extremely resistant to stress corrosion cracking in boiling 42 w/o MgCl2.

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