𝐓𝐲𝐩𝐞𝐬 𝐨𝐟 𝐰𝐞𝐥𝐝𝐢𝐧𝐠 𝐞𝐥𝐞𝐜𝐭𝐫𝐨𝐝𝐞 𝐜𝐨𝐚𝐭𝐢𝐧𝐠𝐬 𝐟𝐨𝐫 𝐜𝐚𝐫𝐛𝐨𝐧 𝐬𝐭𝐞𝐞𝐥
𝐓𝐲𝐩𝐞𝐬 𝐨𝐟 𝐰𝐞𝐥𝐝𝐢𝐧𝐠 𝐞𝐥𝐞𝐜𝐭𝐫𝐨𝐝𝐞 𝐜𝐨𝐚𝐭𝐢𝐧𝐠𝐬 𝐟𝐨𝐫 𝐜𝐚𝐫𝐛𝐨𝐧 𝐬𝐭𝐞𝐞𝐥
SMAW:
𝟭- 𝗖𝗲𝗹𝗹𝘂𝗹𝗼𝘀𝗲-𝘀𝗼𝗱𝗶𝘂𝗺 (𝗘𝗫𝗫𝟭𝟬):
With cellulosic material in the form of wood flour or reprocessed low alloy electrodes have up to 30 percent paper.
The gas shield contains carbon dioxide and hydrogen, which are reducing agents.
These gases tend to produce a digging arc that provides deep penetration. (used often for pipelines)
𝟮- 𝗖𝗲𝗹𝗹𝘂𝗹𝗼𝘀𝗲-𝗽𝗼𝘁𝗮𝘀𝘀𝗶𝘂𝗺 (𝗘𝗫𝗫𝟭𝟭): This electrode is very similar to the -cellulose-sodium electrode, except more potassium is used than sodium.
𝟯- 𝗥𝘂𝘁𝗶𝗹𝗲-𝘀𝗼𝗱𝗶𝘂𝗺 (𝗘𝗫𝗫𝟭𝟮):
With rutile or titanium dioxide content is relatively high with respect to the other components. Provides a fairly high rate of deposition.
𝟰- 𝗥𝘂𝘁𝗶𝗹𝗲-𝗽𝗼𝘁𝗮𝘀𝘀𝗶𝘂𝗺 (𝗘𝗫𝗫𝟭𝟯): This electrode coating is very similar to the rutile-sodium type, except that potassium is used to provide arc ionization.
𝟱- 𝗥𝘂𝘁𝗶𝗹𝗲-𝗶𝗿𝗼𝗻 𝗽𝗼𝘄𝗱𝗲𝗿 (𝗘𝗫𝗫𝗫𝟰):
Very similar to the rutile coatings mentioned above, except that iron powder is added. If iron content is 25 to 40 percent, the deposition rate is increased based on the amount of iron powder in the coating.
𝟲- 𝗟𝗼𝘄 𝗵𝘆𝗱𝗿𝗼𝗴𝗲𝗻-𝘀𝗼𝗱𝗶𝘂𝗺 (𝗘𝗫𝗫𝗫𝟱):
With high proportion of calcium carbonate or calcium fluoride are called low hydrogen, lime ferritic, or basic type electrodes.
These electrode coatings are baked at a higher temperature and stored under controlled conditions.
They provide the highest ductility with medium arc and moderate penetration.
𝟳- 𝗟𝗼𝘄 𝗵𝘆𝗱𝗿𝗼𝗴𝗲𝗻-𝗽𝗼𝘁𝗮𝘀𝘀𝗶𝘂𝗺 (𝗘𝗫𝗫𝗫𝟲):
This type of coating is similar to the low hydrogen-sodium, except for the substitution of potassium for sodium to provide arc ionization.
𝟴- 𝗟𝗼𝘄 𝗵𝘆𝗱𝗿𝗼𝗴𝗲𝗻-𝗽𝗼𝘁𝗮𝘀𝘀𝗶𝘂𝗺 𝘄𝗶𝘁𝗵 𝗜𝗿𝗼𝗻 𝗣𝗼𝘄𝗱𝗲𝗿 (𝗘𝗫𝗫𝟭𝟴):
The coatings in this class of electrodes are similar to the low-hydrogen type mentioned above. If Iron powder added with content higher than 35 to 40 percent, the electrode is classified as an EXX18.
𝟵- 𝗟𝗼𝘄 𝗵𝘆𝗱𝗿𝗼𝗴𝗲𝗻-𝗶𝗿𝗼𝗻 𝗽𝗼𝘄𝗱𝗲𝗿 (𝗘𝗫𝗫𝟮𝟴):
Similar to the EXX18 but has 50 percent or more iron powder in the coating. It is usable only when welding in the horizontal fillet and flat positions. The deposition rate is higher than EXX18.
𝟭𝟬- 𝗜𝗿𝗼𝗻 𝗼𝘅𝗶𝗱𝗲-𝘀𝗼𝗱𝗶𝘂𝗺 (𝗘𝗫𝗫𝟮𝟬):
With high iron oxide content produce a weld deposit with a large amount of slag. This can be difficult to control.However, it produces high-speed deposition and medium penetration .
𝟭𝟭- 𝗜𝗿𝗼𝗻-𝗼𝘅𝗶𝗱𝗲-𝗶𝗿𝗼𝗻 𝗽𝗼𝘄𝗲𝗿 (𝗘𝗫𝗫𝟮𝟳):
Very similar to the iron oxide-sodium type, except it contains 50 percent or more iron power. The increased amount of iron power greatly increases the deposition rate.
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