A method for chemically plating nickel-phosphorus alloy on the surface of beryllium aluminum alloy
A technology of beryllium aluminum alloy and surface chemistry, applied in the field of chemical plating process, can solve problems such as increasing the difficulty of repairing, and achieve the effects of simple and easy method, simple solution preparation and high stability
Active Publication Date: 2021-01-05
CHANNGCHUN CHANGGUANG ADVANCED OPTICS TECH CO LTD
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Problems solved by technology
The beryllium aluminum alloy after zinc dipping for the second time is immersed in an acidic nickel-phosphorus alloy plating solution at 80-90°C after cleaning. It cannot be plated on the surface of beryllium aluminum alloy, and the acidic substance in the solution will continue to corrode the beryllium aluminum alloy substrate, making it more difficult to repair
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[0018] The method for chemically plating nickel-phosphorus alloy on the surface of beryllium aluminum alloy of the present invention specifically comprises the following steps:
[0019] Step 1. Sand blasting: spray quartz sand onto the surface of beryllium aluminum alloy for surface cleaning and roughening treatment;
[0020] Step 2, cleaning the surface of the beryllium aluminum alloy with acetone and degreasing it;
[0021] Step 3, Pickling: Use ammonium bifluoride and hydrogen peroxide acidic aqueous solution to clean the surface of the beryllium aluminum alloy treated in step 2; the concentration of ammonium bifluoride in the acidic aqueous solution is 10-100g / L, and the concentration of hydrogen peroxide is 1-100ml / L ;Clean at room temperature for 1-5min;
[0022] Step 4. Repeatedly wash with hot and cold water alternately for 3-5 times, using the principle of thermal expansion and contraction to thoroughly wash away the residual solution in the micropores on the surface...
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The invention relates to a method for chemical plating of a nickel-phosphorus alloy on the surface of a beryllium-aluminum alloy. The method includes the following steps that sand blasting is performed; degreasing treatment is performed; the surface of the beryllium-aluminum alloy is cleaned through an ammonium bifluoride and hydrogen peroxide acidic aqueous solution; cleaning is performed alternately with cold water and hot water; the surface of the beryllium-aluminum alloy is dipped in a nickel-ion-containing mixed aqueous solution for nickel dipping; cleaning is performed alternately with cold water and hot water; nickel plating is performed on the surface of the beryllium-aluminum alloy; and a nickel-plated beryllium-aluminum alloy is put in a drying oven for heat preservation. The method is simple and easy to implement, solution preparation is simple, and the solution stability is extremely high; acidic high-temperature chemical nickel plating is performed after nickel dipping isfinished, whether a low-phosphorous solution or an intermediate-phosphorous solution or a high-phosphorous solution is adopted, the chemical nickel-plated layer is uniform, the phenomena such as localplating omission, needle holes and pitting are avoided, the chemical nickel-plated layer is good in bonding force and not prone to falling off, the surface crystallization is uniform and delicate, and the slight yellow luster of metal nickel is shown.
Description
technical field [0001] The invention belongs to the technical field of electroless plating technology, and relates to a method for electroless plating nickel-phosphorus alloy on the surface of beryllium aluminum alloy. Background technique [0002] At present, there are two ways to form beryllium aluminum alloy materials, casting and powder metallurgy. [0003] Compared with traditional aluminum alloys, beryllium aluminum alloys with a beryllium content of 62% are quite different in terms of molding methods, density, material hardness, linear expansion coefficient, physical properties, and chemical properties. Surface treatment methods suitable for aluminum alloys are not completely suitable for beryllium aluminum alloys. According to Faraday's first and second laws, it is difficult for nickel-phosphorus alloys to be directly plated on the surface of beryllium-aluminum alloys. The beryllium aluminum alloy after zinc dipping for the second time is immersed in an acidic nick...
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IPC IPC(8): C23C18/32C23C18/18
CPCC23C18/1806C23C18/1844C23C18/32
Inventor 张继真姚远管海军王哈徐放
Owner CHANNGCHUN CHANGGUANG ADVANCED OPTICS TECH CO LTD