Electrode classification of the material in the Welding Electrode  drug skin welding classification from different angles. From the perspective of welding metallurgy, according to the basicity of the slag welding rod is divided into acid electrode and alkaline welding rod; the main component of the electrode drug skin electrode is divided into a lime-titania type electrode, ilmenite type electrode, low hydrogen type electrode iron powder electrode. [Such as the tensile strength of deposited metal, the chemical composition of type> from the standardization point of view, in accordance with the characteristics of the electrode, the electrode is divided into many types and different levels in order to determine the electrode of a variety of type. From the use of perspective, but also the electrode is divided into ten categories of structural steel welding rod, heat-resistant steel rod and stainless steel electrode. Now a variety of classification methods are described below. (A) of the slag basicity classification
 Will electrode in the actual production is usually divided into two categories, acid electrode and alkaline electrode (also known as low-hydrogen electrodes, which are mainly according to the basicity of the slag, ie slag etching of oxides and alkaline oxidation the proportion of objects classified branded slag in acidic oxide ^ for a major proportion "of the acid electrode, and vice versa is the alkaline electrode.
 To compare the welding performance of the Shang Yi acid electrode arc soft, little spatter, good slag fluidity and coverage, therefore, weld appearance constricted view of the solder wave is close, forming smooth; alkali even electrode metal transfer short-circuit transition arc is not stable enough, the poor coverage of the melting economy convex weld shape and weld appearance corrugated rough, but in the upward vertical position welding, easy to operate. Acidic electrode coating contains more iron oxide, titanium oxide and silicon oxide, etc., strong oxidation in the welding process, to alloy cable burning more You in the weld metal oxygen and hydrogen content more, and thus ductility, toughness low acid electrode is generally both AC and DC. The typical acid electrode is] 422.
 Alkaline electrode coating Cao containing large amounts of marble and fluorite, and the ferroalloy more deoxidizer and alloying agent, drug leather sufficient deoxidation capability. Furthermore, the alkaline electrode depends mainly on the marble and other carbonate decomposition of carbon dioxide as shielding gas, compared with the acid electrode, lower partial pressure of hydrogen in the atmosphere in the arc column, and the calcium fluoride in fluorite in Gao temperature and hydrogen combined into a gasification hydrogen (only plants), thereby reducing the hydrogen content in the weld, and alkaline welding rod is also known as low-hydrogen electrodes. However, due to the fluorine anti-ionization, so the alkaline electrode arc stable burning, generally only DCRP <electrodes
Received positive> welding, only when the drug skin contains large amounts of stable arc agent only when the AC and DC. With the Zang sexual Welding Rod, due to less oxygen and hydrogen content in weld metal, non-metallic inclusions is less, so Gao ductility and impact toughness. General welding of important structures (such as to withstand the dynamic load of the structure) or more rigid structure and the poor weldability of steel alkaline electrode. Typical of the alkaline electrode is] 507. Acid electrode and alkaline electrode process performance are shown in Table 1-8. At room temperature, per 1006 melt diffusible hydrogen content in the deposited metal, alkaline electrode 1? 101 111 ^ acid electrode, compared with 17 to 5011 ^. Various types of electrodes deposited gold shavings in the hydrogen content shown in Figure 1-5.
 The oxygen content of the various electrodes of the weld metal (non-metallic oxides from the weld metal, & 0, translation might 00,3 丨 ^, the total oxygen are as follows: cellulose-type titanium oxide type, ilmenite- 0.06 "" 0.100 ^ 0 ^ 100; iron oxide type it? force .130; low hydrogen type 0.028 ^) 6? "40 ^.