Electrochemical Impedance Measurement of Type 304 Stainless Steel under SSRT Conditions

Sunada, Satoshi; Majima, Kazuhiko; Matsumoto, Shinya; Yamamoto, Takahisa; Nunomura, Norio

doi:10.2320/jinstmet.70.389

Cited by 5 publications

References 14 publications

(1 reference statement)

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Electrochemical Impedance Characteristics of Sintered 7075 Aluminum Alloy under SSRT Test

Sunada¹,

Nunomura²

2013

Pricm

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Powder metallurgy (P/M) process has the advantage of better formability to fabricate complex shape products without machining and welding. And recently this P/M process has been applied to the production of aluminum alloys. The P/M aluminum alloys thus produced also have received considerable interest because of their fine and homogeneous structure. Many papers have been published on the mechanical properties of the aluminum alloys produced by P/M process while there have been few on their corrosion properties from the view point of electrochemistry. In this experiment, therefore, two kinds of 7075 aluminum alloys prepared by the conventional ingot metallurgy (I/M) process and P/M process were used, I/M material is commercially available. and their corrosion behavior were investigated through the electrochemical tests such as potentiodynamic polarization test, slow rate strain tensile (SSRT) test and electrochemical impedance spectroscopy (EIS) measurement under SSRT test in the corrosion solution and the deionized water.

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Electrochemical Impedance Characteristics of Sintered 7075 Aluminum Alloy under SSRT Test

Sunada¹,

Nunomura²

2013

Pricm

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A corrosion study of nickel–copper and nickel–copper–palladium welding filler metals

Liang¹,

Sowards²,

Frankel³

et al. 2010

Materials & Corrosion

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In an effort to reduce the release of fumes containing carcinogenic Cr 6þ during arc welding of stainless steel, Cr-free filler metals for welding of SS304 have been developed. Corrosion studies were carried out on 304L stainless steel samples welded with these Cr-free consumables. The corrosion properties of gas tungsten arc (GTA) and shielded metal arc (SMA) welds fabricated with Ni-Cu and Ni-Cu-Pd consumables were found to be comparable to those of welds fabricated with SS308L, the standard filler metal used with SS304. Although the breakdown potentials of the welds made using both welding processes were lower than that of the SS308L GTA weld, the repassivation potentials of these welds were much higher. Generally, the repassivation potential is a more conservative measure of susceptibility to localized corrosion. Accordingly, the Ni-Cu and Ni-Cu-Pd welds were more resistant to crevice corrosion than SS308L welds. The addition of a small amount of Pd improved the corrosion resistance relative to Ni-Cu welds, which is consistent with previous studies from specially-prepared button samples and bead-on-plate samples. Other corrosion studies such as creviced and uncreviced long time immersion, atmospheric exposure, and slow strain rate testing suggest that Ni-Cu-Pd filler metal can be a potential replacement for the conventional SS308L filler metal for joining SS304.

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Electrochemical Impedance Characteristics of Sintered 7075 Aluminum Alloy under SSRT Test

Sunada

Nunomura

2013

Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing

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Electrochemical Impedance Measurement of Type 304 Stainless Steel under SSRT Conditions

Cited by 5 publications

References 14 publications

Electrochemical Impedance Characteristics of Sintered 7075 Aluminum Alloy under SSRT Test

Electrochemical Impedance Characteristics of Sintered 7075 Aluminum Alloy under SSRT Test

A corrosion study of nickel–copper and nickel–copper–palladium welding filler metals

Electrochemical Impedance Characteristics of Sintered 7075 Aluminum Alloy under SSRT Test

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