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Preparation method of chemical nickeling phosphorus alloy film

A technology for electroless nickel-phosphorus and alloy coatings, which is applied in the field of preparation of electroless nickel-phosphorus alloy coatings for anti-corrosion and anti-fouling on copper alloy spiral surfaces, and can solve the problem of unsatisfactory anti-fouling coating effects and inability to resist corrosion in flowing seawater and other problems, to achieve the effect of easy control, uniform and dense thickness, and improved corrosion resistance

Inactive Publication Date: 2007-02-14
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0011] For the corrosion and marine biofouling of the propellers of high-performance ships, in addition to the use of corrosion-resistant materials and scientific propeller structure design, the existing methods of protecting the propeller surface by cathodic protection and coating protection are difficult to solve well Corrosion problems in propeller operating conditions
At present, the antifouling coating used on the surface of the propeller is not ideal, and it cannot have the corrosion resistance of flowing seawater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] The surface of the selected propeller is made of high manganese aluminum bronze 12-8-3-2 alloy, and the plating operation is carried out according to the following steps:

[0038] (1) Degreasing: first wipe the surface of the plated piece with decontamination powder to remove the attached oil, rinse it with running water; then soak the plated piece in acetone for 30 minutes to completely remove the surface oil.

[0039] (2) Derusting: Wash in a commercially available 5% metal cleaning agent solution for 10 minutes at a temperature above 60°C, and then rinse with running water to remove the metal cleaning agent on the surface.

[0040] (3) Activation: use 8% H 2 SO 4 (Sulfuric acid) solution is used as an activator, and the activation time is 50 seconds at room temperature, and the surface is cleaned with distilled water after activation.

[0041] (4) Electroless plating: The formulation of the electroless plating solution is as follows:

[0042] Main salt: nickel sul...

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PUM

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Abstract

The invention relate to a chemical plating nickel phosphor alloy coating manufacturing method. It includes oil removing, rust removing, activating, chemical plating, and post treatment. Its bath uses secondary phosphorous acid as reducer, nickel sulfate as main salt, adds complexing agent, buffering agent, stabilizing agent, etc. It optimizes bath constituent and chemical plating technological parameter by homogeneous design and single factor test method to form active surface, reduce nickel phosphor alloy coating at certain chemical plating condition. The invention has the advantages of safe, reliable, even coating, long useful life, cathodic protection function for copper alloy screw propeller, lowering marine life defilement.

Description

Technical field: [0001] The invention relates to a method for preparing an electroless nickel-phosphorus alloy coating for preventing flowing sea water from scouring corrosion and marine biofouling on the copper alloy surface of a high-performance propeller, in particular to an electroless nickel-phosphorus alloy plating for anti-corrosion and anti-fouling on the surface of a copper alloy spiral Coating preparation method. technical background: [0002] At present, the propellers of some high-performance ships are made of various copper alloy materials. During the operation of the ship propeller, it forms a relative high-speed motion with seawater, which makes the surface of the propeller form an extremely complex flow state, and there are serious erosion (wear) corrosion and cavitation corrosion on the surface of the propeller. At present, the commonly used methods to prevent erosion (abrasion) corrosion and cavitation corrosion include: choosing corrosion-resistant materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/16C23C18/36
Inventor 王洪仁孙明先王廷勇马焱邓春龙
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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