Electrochemical Etching of P-Type Gallium Phosphide

Mussabek, Gauhar

doi:10.5593/sgem2018/6.1/s24.025

Cited by 1 publication

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“…After all, they have high corrosion resistance to intercrystalline corrosion in these media [2]. But the circulating water, which is used to cool the technological product during the production of acids, contains chlorides and other anions [3][4][5][6], which can be the cause of pitting or crevice corrosion of heat exchangers [7][8][9][10]. In particular, design features of plate-like heat exchangers and chlorides in circulating water can be the cause of their crevice corrosion between the corrugations of adjacent plates.…”

Section: Introductionmentioning

confidence: 99%

Prediction the durability of heat exchangers made of 06KhN28MDT alloy (analogous to AISI904L steel) to crevice corrosion during their operation in recycled water

Dzhus

2023

phst

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Plate-like heat exchangers commonly use 06KhN28MDT alloy for various acids, which is resistant to localized corrosion but susceptible to crevice corrosion in cooling water. This study assessed the alloy's crevice corrosion resistance in 3% NaCl circulating water using electrochemical methods. Anodic potentiodynamic curves determined Er, Ecor, and Ecrew potentials. Resistance was assessed based on Ecrew potential, simulating a 0.3 mm gap. Ecrew potentials varied: melts 1 and 5 were most positive (1.10 and 1.13V), melts 2 and 3 the most negative (0.58V), due to differences in Cr, Mo, Ti, Cu content. Melts 2 and 3, with excess carbon, had negative Ecrew potentials. No correlation was found between Ecrew and titanium nitride volume, but melt 1 had more than melts 2 and 5. ΔE, the difference between Er and Ecor, produced similar results. Melts 1, 4, and 5 were highly resistant, melts 2 and 3 less so. In conclusion, heat exchanger manufacturers should choose low-C, high-Cr, Mo, Ti, Cu alloy for better crevice corrosion resistance in circulating water.

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Section: Introductionmentioning

confidence: 99%

Prediction the durability of heat exchangers made of 06KhN28MDT alloy (analogous to AISI904L steel) to crevice corrosion during their operation in recycled water

Dzhus

2023

phst

View full text Add to dashboard Cite

show abstract

Electrochemical Etching of P-Type Gallium Phosphide

Cited by 1 publication

References 0 publications

Prediction the durability of heat exchangers made of 06KhN28MDT alloy (analogous to AISI904L steel) to crevice corrosion during their operation in recycled water

Prediction the durability of heat exchangers made of 06KhN28MDT alloy (analogous to AISI904L steel) to crevice corrosion during their operation in recycled water

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