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A gold-palladium-silver alloy corrosion-resistant material for soda industry and preparation method thereof
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A corrosion-resistant material and industrial technology, applied in the field of corrosion-resistant alloys, to achieve the effects of enhancing corrosion resistance, improving wear resistance, and inhibiting grain growth
Inactive Publication Date: 2015-08-19
KUNMING INST OF PRECIOUS METALS
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Abstract
Description
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Problems solved by technology
In view of the increasingly harsh working conditions in the chlor-alkali industry, the design of the gold-palladium-silver alloy alloy composition is the best way to improve the service life. At present, there are few reports on this alloy, especially adding a small amount of Pt, Ir, W, RE improve the service life of materials has not been reported yet
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Embodiment 1
[0009] (1) The purity is Au≥99.99%, Pd≥99.99%, Ag≥99.99%, Pt≥99.95%, Ir≥99.95%, W≥99.95%, RE≥99.95%. Dosing according to the composition Au25Pd25Ag (PtIrWRE) 0.2.
[0010] (2) Put Au, Pd, and Ag into a vacuum induction melting furnace for melting and heating and refining to alloy them.
[0011] (3) Add Pt, Ir, W, and RE into the alloy liquid in sequence, and degas repeatedly.
[0013] (5) The alloy is kept at 700°C for 3 hours to make it homogenized.
[0014] (6) Rolling, intermediate heat treatment, surface treatment, and finish rolling into plates.
Embodiment 2
[0016] (1) The purity is Au≥99.99%, Pd≥99.99%, Ag≥99.99%, Pt≥99.95%, Ir≥99.95%, W≥99.95%, RE≥99.95%. Dosing is carried out according to the composition Au25Pd25Ag (PtIrWRE) 0.4.
[0017] (2) Put Au, Pd, and Ag into a vacuum induction melting furnace for melting and heating and refining to alloy them.
[0018] (3) Add Pt, Ir, W, and RE into the alloy liquid in sequence, and degas repeatedly.
[0020] (5) The alloy is kept at 700°C for 3 hours to make it homogenized.
[0021] (6) Rolling, intermediate heat treatment, surface treatment, and finish rolling into plates.
Embodiment 3
[0023] (1) The purity is Au≥99.99%, Pd≥99.99%, Ag≥99.99%, Pt≥99.95%, Ir≥99.95%, W≥99.95%, RE≥99.95%. Dosing according to the composition Au25Pd25Ag (PtIrWRE) 0.8.
[0024] (2) Put Au, Pd, and Ag into a vacuum induction melting furnace for melting and heating and refining to alloy them.
[0025] (3) Add Pt, Ir, W, and RE into the alloy liquid in sequence, and degas repeatedly.
[0027] (5) The alloy is kept at 700°C for 3 hours to make it homogenized.
[0028] (6) Rolling, intermediate heat treatment, surface treatment, and finish rolling into plates.
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Abstract
The invention discloses a gold-palladium-silver alloysystemcorrosion-resistant material for granular caustic soda industries and a preparation method thereof. The gold-palladium-silver alloysystemcorrosion-resistant material is prepared by adding a small quantity amount of Pt, Ir, W and multi-element RE (rare-earth elements) to AuPdAg alloy, wherein the addition amount (percentage by mass): ) is 0.1%-1.0%. The gold-palladium-silver alloy systemcorrosion-resistant material has the characteristics of good machinability, high-temperature strength, weldability, corrosion-resistant performance and the like, can be used as a corrosion-resistant material and is applied to the preparation of granular caustic soda in chlorine-alkali industries and has long service life and high reliability.
Description
technical field [0001] The invention relates to a corrosion-resistant alloy, in particular to a gold-palladium-silver alloy corrosion-resistant material used in the soda industry. Background technique [0002] Granular soda is the most common and used solid alkali. It has good fluidity, easy to measure, low dust, environmental protection, instant, high purity, beautiful appearance, etc. Granular soda is an important basic chemical raw material and has a wide range of uses. In the chlor-alkali industry, highly concentrated lye has strong corrosion and erosion on alloy material components in the process of preparing granular alkali, resulting in a sharp decline in the service life of alloy material components. In recent years, with the rapid development of the chlor-alkali industry, its performance indicators in terms of dimensional stability of granular alkali, corrosion resistance, high-temperature strength and service life have been continuously improved, so it is urgent to...
Claims
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