Method for improving corrosion performance of bulk amorphous alloy through oxidizing annealing in air atmosphere

Abstract

The invention discloses a method for improving the corrosion performance of bulk amorphous alloy through oxidizing annealing in an air atmosphere. The method comprises the following steps: firstly, after polishing the surface of a bulk amorphous alloy, washing the surface of the bulk amorphous alloy with alcohol; secondly, placing the bulk amorphous alloy in a muffle furnace to heat the bulk amorphous alloy to between 286 and 336 DEG C at a speed of 10 DEG C / min; and thirdly, keeping the temperature constant for 5 to 10 hours to form a metallic oxide ceramic layer with high corrosion resistance on the surface of the bulk amorphous alloy. Compared with other common methods for improving the corrosion resistance of the bulk amorphous alloy, the technology has the advantages of greatly improving the corrosion resistance of the bulk amorphous alloy without influencing the glass forming ability of the alloy, along with simplicity, easy implementation and low cost. The process avoids changes in the original dimension and shape of a workpiece, ensures an excellent bonding force between a formed oxide layer and a substrate, and is applicable to the final processing of parts and products.

Description

Method of Improving Corrosion Properties of Bulk Amorphous Alloys by Oxidation Annealing in Air Atmosphere technical field The invention relates to surface anticorrosion technology of amorphous alloys, in particular to a method for improving the corrosion performance of bulk amorphous alloys by oxidation annealing in an air atmosphere. Background technique In the 1980s, Turnbull in the United States and the Inoue research group at Tohoku University in Japan each developed a multi-element alloy system with good glass-forming ability and a critical size of several millimeters, thus revealing the vigorous research on bulk amorphous alloys. Prelude to development. For example, the research on bulk amorphous alloys has become one of the most active subjects in the field of metal materials research. Due to the special structure of amorphous alloys, it has a series of excellent physical, chemical, magnetic and especially mechanical properties, such as high strength, low modulus,...

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Problems solved by technology

However, the microalloying method often reduces the glass forming ability, and the alloying elements are limited by alloying laws such as thermodynamic phase equilibrium and solid solubility, while the ion implantation method is expensive and difficult to apply on a large scale

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