Thesis: In welding, the six commonly used types of electrodes are E6010, E6011, E6012, E6013, E7014 and E6015.
2. Six Commonly Used Types of Electrodes
3.3. Background of Welding
3.4. Background of Electrode
3.5. Six Types of Commonly Used Electrodes
Background of Welding
According to Cary (1998), the origin of welding can be traced to the Bronze Age more than 2000 years ago, wherein; tiny circular gold boxes were formed by pressure welding the lap joints together. Ancient sealed Egyptian tombs also reveal depictions of welders and tools. Much later, Sir Humphry Davy's production of an arc between the two carbon electrodes in early 1800s, along with Edmund Davy's discovery of acetylene in 1836, spearheaded the era of modern welding techniques. Till the 19th century, welding was mostly confined to the blacksmith's shop, where he would unite the metal pieces by a method called forge welding. It involved heating of the two metal pieces and then hammering away until the union took place. This time-consuming and tedious process was replaced by other quicker techniques, which were made possible due to the introduction of electricity into industrial processes. Nowadays, there are various methods that are followed after the advent of electricity. Now different sources of energy are used for welding purposes like gas flame, electric current, laser, electronic beam, friction and ultra sound. Some of them are Arc welding, Gas welding and Resistance welding. In addition, as defined by () Welding means the process of joining metals by causing melt due to heat. It happens by melting the workpiece with weld pool. The joint gets stronger when it cools down. It’s heats when the weld pool is used with the workpiece & produces weld in that time. In all fabrication companies welding is very essential. Since welding has been used in steel fabrication its uses has expanded in other industrial sectors like construction, mechanical and car manufacturing etc.
Figure 1: Welding
Background of Electrode
According to Cary (1998), an electrode comes from the Greek word elektron which means amber. The word electrode was composed by an English scientist Michael Faraday who contributed significantly to the study of electromagnetism and electrochemistry. In addition, Pierre (1974) says that an electrode is used to conduct current through a workpiece to combine two pieces together. Depending upon process, the electrode is either consumable which uses the gas metal arc welding and shielded metal arc welding, or non-consumable which the TIG welding is used. Faraday (1834) also stresses that an electrode is an electrochemical cell and it has two common types which are typically found in batteries. The anode, is an electrode through which electric current flows out of polarized electrical device and the cathode, is an electrode which electric current flows into a polarized electric device.
Figure 2: The Electrodes
E6010 Welding Electrode
Sacks (1960) says that E6010 welding electrodes is one of the most commonly used electrode it is used for welding root passes in pipe and even for the fill passes on pipelines. It is one of the American Welding Society (AWM) classifications. The letter E on E6010 stands for electrode the next two numbers on it means 60000 pound per square inch (psi) tensile strength. And the number 1 means that E6010 can be weld in all position, vertical, horizontal, over hand and flat position. Weld penetration of an electrode defend on the type of current used. For instance as Bruce Bauerlein explained, E6010 electrode uses Direct Current Reverse Polarity (DCRP) type of current and for this type of...