Mg-Mn-Ca-Zn-Sr sacrificial anode with high current efficiency

Abstract

The invention discloses an Mg-Mn-Ca-Zn-Sr sacrificial anode with high current efficiency, which belongs to the technical field of sacrificial anodes and is characterized by comprising the following elements in percentage by weight: 0.93 percent of Mn, 0.13 percent of Ca, 0.05 percent of Zn, 0.07 percent of Sr, less than 0.045 percent of Si, less than 0.018 percent of Cu, less than 0.001 percent of Ni, less than 0.030 percent of Fe, and the balance of Mg. Aiming at the defect that the conventional magnesium anode has low current efficiency, by adding trace elements, the dissolution evenness and corrosion resistance of the magnesium anode are increased, and the current efficiency of the magnesium anode is improved.

Description

technical field

[0001] The invention belongs to the technical field of sacrificial anodes, in particular to a Mg-Mn-Ca-Zn-Sr sacrificial anode with high current efficiency. Background technique

[0002] Electrochemical protection is one of the most important methods to prevent metal corrosion. It uses external current to change the potential of the corroded metal to slow down or inhibit the corrosion of the metal. Pass enough anode current to the metal surface to make the metal undergo anodic polarization, that is, the potential becomes positive and is in a passivation state, and the dissolution of the metal is greatly slowed down, which is called anodic protection. At present, there are three types of sacrificial anode materials that have been successfully developed and widely used: magnesium anode, zinc anode and aluminum anode.

[0003] "Research on the Electrochemical Performance of AZ63B Magnesium Sacrificial Anode" (Journal of Qinghai Normal University (Natural Scienc...

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