Question

Give a reason why - carbon dioxide is not used
in electric arc welding of metals.​

Answer 1

Answer:

Because carbon dioxide is harmful for humans and animals.

Answer 2

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• ɪɴ ʜɪɢʜᴇʀ ᴄᴏɴᴄᴇɴᴛʀᴀᴛɪᴏɴs (ᴜᴘ ᴛᴏ 25% ʜʏᴅʀᴏɢᴇɴ), ɪᴛ ᴍᴀʏ ʙᴇ ᴜsᴇᴅ ғᴏʀ ᴡᴇʟᴅɪɴɢᴄᴏɴᴅᴜᴄᴛɪᴠᴇ ᴍᴀᴛᴇʀɪᴀʟs sᴜᴄʜ ᴀs ᴄᴏᴘᴘᴇʀ.
• ʜᴏᴡᴇᴠᴇʀ, ɪᴛ sʜᴏᴜʟᴅ ɴᴏᴛ ʙᴇ ᴜsᴇᴅ ᴏɴ sᴛᴇᴇʟ, ᴀʟᴜᴍɪɴᴜᴍ ᴏʀ ᴍᴀɢɴᴇsɪᴜᴍ ʙᴇᴄᴀᴜsᴇ ɪᴛ ᴄᴀɴᴄᴀᴜsᴇ ᴘᴏʀᴏsɪᴛʏ ᴀɴᴅ ʜʏᴅʀᴏɢᴇɴ ᴇᴍʙʀɪᴛᴛʟᴇᴍᴇɴᴛ.
• ᴍɪxᴛᴜʀᴇs ᴏғ ᴀʀɢᴏɴ,ᴄᴀʀʙᴏɴ ᴅɪᴏxɪᴅᴇ ᴀɴᴅ ᴏxʏɢᴇɴ ᴀʀᴇ ᴍᴀʀᴋᴇᴛᴇᴅ ғᴏʀ ᴡᴇʟᴅɪɴɢ sᴛᴇᴇʟs.