How About The Corrosion Rate of Aluminum 5052 in Seawater
With the further application of aluminum alloys in important equipment such as aerospace and ships, its corrosion performance and corrosion behavior in the marine atmosphere have attracted much attention. The corrosion rate of aluminum in seawater is a parameter reflecting the speed of corrosion. How about 5052 aluminum corrosion resistance?
After 40 days of simulated seawater experiments, the weight loss method was used to measure the mass loss of the samples at different times. The corrosion weight loss of 5052 aluminum alloy under different rolling parameters increases linearly with time, and the corrosion kinetics are basically the same, that is, although the initial weight loss is large, the increase in later weight loss will decrease to a certain extent.
Atmospheric corrosion of aluminum and aluminum alloys has its own characteristics. Its resistance to atmospheric corrosion mainly depends on the properties of its surface oxide film and its stability in different environments. One of the factors that determines the pitting potential of alloys is the surface finish of materials. . It is generally believed that the smoother the surface, the less likely pitting corrosion will occur.
The corrosion resistance of the surface of the 5052 aluminum alloy after superfine surface treatment is improved. The corrosion rate increases approximately linearly with the average grain size.
5052 aluminum alloy through cumulative rolling plastic deformation to achieve ultra-fine surface. Corrosion weight loss in simulated ocean-atmosphere experiments was linear with time. As the exposure time prolongs, the corrosion weight loss increases linearly. In the marine atmosphere experiment, the corrosion resistance performance is improved, and the average corrosion rate is reduced by 1/3.
After the surface grain of the material is ultra-fine, for passive metals, due to the increase in the number of active atoms of the material, the reactivity of the material generally increases, and there is a certain size effect on the corrosion rate. At the same time, the grain refinement makes it easier to form a passivation film on the surface , improving the passivation performance of the material. Haomei Aluminum provide the qualified 5052 marine grade aluminum sheet with different tempers like aluminum 5052 h32. Welcome to leave message below to inquire what you need.
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