𝐓𝐲𝐩𝐞đŦ 𝐨𝐟 𝐰𝐞đĨ𝐝đĸ𝐧𝐠 𝐞đĨ𝐞𝐜𝐭đĢ𝐨𝐝𝐞 𝐜𝐨𝐚𝐭đĸ𝐧𝐠đŦ 𝐟𝐨đĢ 𝐜𝐚đĢ𝐛𝐨𝐧 đŦ𝐭𝐞𝐞đĨ

 



𝐓𝐲𝐩𝐞đŦ 𝐨𝐟 𝐰𝐞đĨ𝐝đĸ𝐧𝐠 𝐞đĨ𝐞𝐜𝐭đĢ𝐨𝐝𝐞 𝐜𝐨𝐚𝐭đĸ𝐧𝐠đŦ 𝐟𝐨đĢ 𝐜𝐚đĢ𝐛𝐨𝐧 đŦ𝐭𝐞𝐞đĨ

SMAW:

𝟭- 𝗖𝗲𝗹𝗹𝘂𝗹đ—ŧ𝘀𝗲-𝘀đ—ŧ𝗱đ—ļ𝘂đ—ē (𝗘đ—Ģđ—Ģ𝟭đŸŦ): 

 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- 𝗖𝗲𝗹𝗹𝘂𝗹đ—ŧ𝘀𝗲-đ—Ŋđ—ŧ𝘁𝗮𝘀𝘀đ—ļ𝘂đ—ē (𝗘đ—Ģđ—Ģ𝟭𝟭): This electrode is very similar to the -cellulose-sodium electrode, except more potassium is used than sodium.

đŸ¯- đ—Ĩ𝘂𝘁đ—ļ𝗹𝗲-𝘀đ—ŧ𝗱đ—ļ𝘂đ—ē (𝗘đ—Ģđ—Ģ𝟭𝟮): 

 With rutile or titanium dioxide content is relatively high with respect to the other components. Provides a fairly high rate of deposition.

𝟰- đ—Ĩ𝘂𝘁đ—ļ𝗹𝗲-đ—Ŋđ—ŧ𝘁𝗮𝘀𝘀đ—ļ𝘂đ—ē (𝗘đ—Ģđ—ĢđŸ­đŸ¯): This electrode coating is very similar to the rutile-sodium type, except that potassium is used to provide arc ionization.

𝟱- đ—Ĩ𝘂𝘁đ—ļ𝗹𝗲-đ—ļđ—ŋđ—ŧđ—ģ đ—Ŋđ—ŧ𝘄𝗱𝗲đ—ŋ (𝗘đ—Ģđ—Ģđ—Ģ𝟰): 

 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- 𝗟đ—ŧ𝘄 đ—ĩ𝘆𝗱đ—ŋđ—ŧ𝗴𝗲đ—ģ-𝘀đ—ŧ𝗱đ—ļ𝘂đ—ē (𝗘đ—Ģđ—Ģđ—Ģ𝟱): 

  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. 

đŸŗ- 𝗟đ—ŧ𝘄 đ—ĩ𝘆𝗱đ—ŋđ—ŧ𝗴𝗲đ—ģ-đ—Ŋđ—ŧ𝘁𝗮𝘀𝘀đ—ļ𝘂đ—ē (𝗘đ—Ģđ—Ģđ—Ģ𝟲): 

 This type of coating is similar to the low hydrogen-sodium, except for the substitution of potassium for sodium to provide arc ionization.

𝟴- 𝗟đ—ŧ𝘄 đ—ĩ𝘆𝗱đ—ŋđ—ŧ𝗴𝗲đ—ģ-đ—Ŋđ—ŧ𝘁𝗮𝘀𝘀đ—ļ𝘂đ—ē 𝘄đ—ļ𝘁đ—ĩ 𝗜đ—ŋđ—ŧđ—ģ đ—Ŗđ—ŧ𝘄𝗱𝗲đ—ŋ (𝗘đ—Ģđ—Ģ𝟭𝟴): 

 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.

đŸĩ- 𝗟đ—ŧ𝘄 đ—ĩ𝘆𝗱đ—ŋđ—ŧ𝗴𝗲đ—ģ-đ—ļđ—ŋđ—ŧđ—ģ đ—Ŋđ—ŧ𝘄𝗱𝗲đ—ŋ (𝗘đ—Ģđ—Ģ𝟮𝟴):

 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.

𝟭đŸŦ- 𝗜đ—ŋđ—ŧđ—ģ đ—ŧ𝘅đ—ļ𝗱𝗲-𝘀đ—ŧ𝗱đ—ļ𝘂đ—ē (𝗘đ—Ģđ—Ģ𝟮đŸŦ): 

 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- 𝗜đ—ŋđ—ŧđ—ģ-đ—ŧ𝘅đ—ļ𝗱𝗲-đ—ļđ—ŋđ—ŧđ—ģ đ—Ŋđ—ŧ𝘄𝗲đ—ŋ (𝗘đ—Ģđ—Ģ𝟮đŸŗ): 

 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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