Corrosion Behaviour of High Alloyed Stainless Steel Weld Metals, Joints and Overlays in Standardized Corrosion Tests with some Examples

Posch, Gerhard; Tösch, Josef

doi:10.1007/bf03266490

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…It can be found that when the Nb content decreases to some critical value, the precipitation temperature range increases sharply. Posch et al 12 had also pointed that the time temperature sensitisation (TTS)-curve of stainless steel is shifted to lower temperatures and longer time with the increasing Nb/C ratio. So it is reasonable to expect that the Nb addition of two kinds of Inconel 182 delayed the precipitation procedure and resulted in the grain boundary which was free of precipitation even after the following LTS treatment.…”

Section: Discussionmentioning

confidence: 99%

“…For Inconel 600, the formation of NbC seemed to correlate with increased protection from intergranular corrosion IGC, where a suitable addition of Nb/C had a positive influence. 12,13 For Inconel 182, the Nb addition shows better IGC/IGSCC resistance compared with Inconel 600 with the same thermal treatment. 13 However, the effect of Nb addition on microstructure and IGC/ IGSCC susceptibility of Inconel 182 after LSM process has also not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

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Influence of heat treatments and chemical composition on SCC susceptibility during repairing procedure of overlaying of Inconel 182 by laser surface melting

Bao¹,

Shinozaki²,

Iguro³

et al. 2005

Science and Technology of Welding and Joining

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A practical repairing technique using laser surface melting (LSM) was developed to remove the stress corrosion cracking (SCC) in overlaying of Inconel 182. Influence of microstructure of different heat treatments performed during repairing process on intergranular cracking/intergranular stress corrosion cracking (IGC/IGSCC) susceptibility was discussed. The intergranular precipitate was identified as M23 C6 by TEM. The microstructure with no intergranular precipitate and refiner sub-grain after LSM process shows excellent IGC/IGSCC resistance. The stress relief heat treatment induced severe microstructure of high IGC/IGSCC susceptibility, owing to the semicontinuous intergranular precipitation. The influence of Nb/C ratio on IGC/IGSCC susceptibility of three nickel based superalloys after LSM process was also investigated. For both of the Inconel 182 alloys with different Nb content, the microstructure after LSM process and following sensitisation treatment showed precipitation free grain boundary. The results of corrosion tests also indicated that the material with higher Nb/C ratio showed higher IGC/IGSCC resistance after LSM process and following sensitisation treatment.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of heat treatments and chemical composition on SCC susceptibility during repairing procedure of overlaying of Inconel 182 by laser surface melting

Bao¹,

Shinozaki²,

Iguro³

et al. 2005

Science and Technology of Welding and Joining

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Effect of nitrogen-containing shielding and backing gas on the pitting corrosion resistance of welded lean duplex stainless steel LDX 2101® (EN 1.4162, UNS S32101)

2013

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Carboxymethyl starch as corrosion inhibitor for mild steel

WuWeiming

ChenTianyu

DuHaiyan

et al. 2016

Emerging Materials Research

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In order to seek wider fields of application of carboxymethyl starch (CMS), the inhibition of CMS on mild steel in hydrochloric acid (HCl) solution has been investigated by polarisation curves and electrochemical impedance spectroscopy. The results show that CMS has a good tendency as a corrosion inhibitor in 5% hydrochloric acid solution at room temperature, 40°C and 60°C. When CMS with a concentration of up to 2 g/l was added, the corrosion rate decreased to 11·19 mm/year and the inhibition efficiency was 80·61%. The corrosion rate increased with the increase in temperature of the medium. CMS is found to be a kind of cathode corrosion inhibitor, and the inhibition efficiency increases with increasing concentration of CMS, and the inhibition efficiency is best at room temperature. Passivation will be accelerated on the surface of the electrode when mild steel electrode is in 5% hydrochloric acid solution at 40°C, which leads to good resistance to corrosion.

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Corrosion Behaviour of High Alloyed Stainless Steel Weld Metals, Joints and Overlays in Standardized Corrosion Tests with some Examples

Cited by 4 publications

References 3 publications

Influence of heat treatments and chemical composition on SCC susceptibility during repairing procedure of overlaying of Inconel 182 by laser surface melting

Influence of heat treatments and chemical composition on SCC susceptibility during repairing procedure of overlaying of Inconel 182 by laser surface melting

Effect of nitrogen-containing shielding and backing gas on the pitting corrosion resistance of welded lean duplex stainless steel LDX 2101® (EN 1.4162, UNS S32101)

Carboxymethyl starch as corrosion inhibitor for mild steel

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