Patent Analysis of Aluminum Based Sacrificial Anode Materials at Domestic and Abroad

Abstract

Aluminum-based sacrificial anode is a new kind of sacrificial anode material developed rapidly in recent years. It has many advantages, such as low price, high potential of metal driving, large theoretical capacity and rich resource reserves, and is widely used in marine facilities and petroleum industry. However, the related contents of aluminum-based sacrificial anode are various and difficult to be analyzed statistically. On this basis, the relevant patents of aluminum-based sacrificial anode published at home and abroad are statistically analyzed. According to statistics, China's marine aluminum-based sacrificial anode material patent ratio is 73.4%, oil field aluminum-based sacrificial anode material patent ratio is 26.6% . Foreign patents on aluminum-based sacrificial anode have a long history, and the number of patents after 2000 is relatively small. In addition, according to the three categories of component design, preparation process and auxiliary device, the contents of relevant patents are statistically analyzed. It is found that in recent years, the number of patents related to aluminum-based sacrificial anode auxiliary device is higher than the other two types. In terms of the number of patents published, there has been a sharp increase since 2010, with more than half coming from corporate r & D. At the same time, by classifying the composition of aluminum alloy sacrificial anode material in the patent, the content of zinc, indium, tin, magnesium and titanium in aluminum-based sacrificial anode materials and their effects on the properties of anode materials are summarized, the application of alloying elements at home and abroad is compared and analyzed. The effects of zinc content and gallium content on the performance of anode materials were discussed. Finally, some suggestions on the development of aluminum-based sacrifice are put forward.