June 06, 2023, 06:44:44 AM
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Topic: Gases form at anode during electro-etching process  (Read 1954 times)

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Offline edeaton

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Gases form at anode during electro-etching process
« on: April 17, 2022, 12:04:40 PM »
I do etchings of metal pieces via an electrolysis process. I have tried to find the answer to: What gases are formed in eletrolysis process when the electrolyte is water H2O and epsom salt (magnesium sulphate)MgSO4 and the anode is steel and the cathode is stainless steel. The anode is the piece that oxidizes and the cathode redoxes.

Offline billnotgatez

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Offline Borek

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Re: Gases form at anode during electro-etching process
« Reply #2 on: April 17, 2022, 06:36:32 PM »
All other things present have much higher/lower redox potentials, so water will react first, both on the anode and the cathode.
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Offline utelectrode

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Re: Gases form at anode during electro-etching process
« Reply #3 on: May 10, 2022, 10:00:16 PM »
The most common gases used in etching are fluorine-based or chlorine-based. Common fluorine-based gases are CF4, SF6, CHF3, C4F8, etc. and chlorine-based gases are Cl2, BCl3, CCl4, etc. Most semiconductors and metals can be etched with these gases.
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