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Deep sea environment corrosion-resistant coating and preparation method thereof

A technology for corrosion-resistant coatings and deep-sea environments, applied in coatings, metal material coating processes, ion implantation plating, etc., can solve problems such as nodule defects, penetrating defects, pinhole defects, etc., and achieve porosity reduction , reduce the density, improve the effect of compactness

Pending Publication Date: 2022-01-28
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amorphous carbon-based coatings have sufficient chemical inertness in seawater, but there are still many inherent growth defects in the coatings. Usually, amorphous carbon-based coatings prepared by physical vapor deposition (Physical vapor deposition, PVD) are Growth defects are inevitable during the deposition process, including nodule defects, pinhole defects, and through-type defects, etc.

Method used

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  • Deep sea environment corrosion-resistant coating and preparation method thereof
  • Deep sea environment corrosion-resistant coating and preparation method thereof
  • Deep sea environment corrosion-resistant coating and preparation method thereof

Examples

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Embodiment 1

[0045] In this embodiment, the preparation method of the coating is as follows figure 1 shown, the specific steps are as follows:

[0046] 1. The base is made of 17-4PH stainless steel, and the stainless steel is ultrasonically cleaned with acetone and ethanol. After drying, it is placed in a vacuum chamber, fixed on the workpiece bracket, and evacuated to 3.0×10 -5 Below Torr, then under the conditions of helium flow rate of 35sccm and bias voltage of -150V, the ion source was turned on, the current was adjusted to 0.15A, and the substrate surface was etched with helium plasma for 30min;

[0047] 2. Pour helium gas into the cavity (the amount of helium gas is 55sccm), adopt DC magnetron sputtering technology, maintain the pressure of the cavity at 2.0mTorr, turn on the DC power supply connected to the chromium sputtering target, and set the power supply The frequency is 350Hz, the current is 2.5A, the substrate bias is -150V, the deposition temperature is 150°C, the chromium...

Embodiment 2

[0084] In the present embodiment, the preparation method of coating is as follows:

[0085] 1. The base is made of 2507 duplex stainless steel. The stainless steel is ultrasonically cleaned with acetone and ethanol. After drying, it is placed in a vacuum chamber, fixed on the workpiece bracket, and evacuated to below 2.0×10-5 Torr. Under the condition that the negative bias voltage is 100V, the ion source is turned on, the current is 0.1A, and the substrate surface is etched by krypton plasma for 40min;

[0086] 2. Pour krypton gas into the cavity (the inflow amount of krypton gas is 50sccm), adopt DC magnetron sputtering technology, maintain the pressure of the cavity at 1.9mTorr, turn on the DC power supply connected to the chromium sputtering target, and set the power supply The frequency is 350Hz, the current is 2.5A, the substrate bias voltage is -100V, the deposition temperature is 120℃, the chromium transition layer is deposited, and nitrogen gas (the amount of nitrogen...

Embodiment 3

[0098] In the present embodiment, the preparation method of coating is as follows:

[0099] 1. The base is made of 431 stainless steel. The stainless steel is ultrasonically cleaned with acetone and ethanol. After drying, it is placed in a vacuum chamber, fixed on the workpiece bracket, and evacuated to 4.0×10 -5 Torr or less, then under the conditions of argon flow rate of 40sccm and bias voltage of -200V, turn on the ion source, adjust the current to 0.2A, and use argon plasma to etch the surface of the substrate for 40min;

[0100] 2. Pour argon gas into the cavity (the amount of argon gas is 60sccm), adopt DC magnetron sputtering technology, maintain the pressure of the cavity at 2.1mTorr, turn on the DC power supply connected to the chromium sputtering target, and set the power supply The frequency is 350Hz, the current is 3A, the substrate bias is -200V, the deposition temperature is 180℃, the chromium transition layer is deposited, and nitrogen gas (the amount of nitrog...

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Abstract

The invention discloses a preparation method of a deep sea environment corrosion-resistant coating , which comprises the following steps: continuously introducing inert gas, sputtering on the surface of a matrix to obtain a chromium-based coating, and then introducing dry gas to form a chromium / chromium nitride coating on the surface of the matrix; sputtering on the chromium / chromium nitride coating to obtain an amorphous carbon layer, and sputtering an amorphous carbon / chromium-based coating on the chromium / chromium nitride coating to obtain an initial corrosion-resistant coating; adding the initial corrosion-resistant coating into a solution for ultrasonic cleaning and wiping, under the pressure of 0.1-0.4 MPa, flushing the initial corrosion-resistant coating with dry gas, and then depositing the initial corrosion-resistant coating flushed with the dry gas again; and carrying out iterative deposition, and depositing an amorphous carbon functional layer on the iterated corrosion-resistant coating to obtain the deep sea environment corrosion-resistant coating. The deep sea environment corrosion-resistant coating prepared by the preparation method has relatively good corrosion resistance in a marine environment.

Description

technical field [0001] The invention belongs to the technical field of surface engineering protection, and particularly relates to a deep-sea environment corrosion-resistant coating and a preparation method thereof. Background technique [0002] The marine environment is characterized by high salinity, high pressure, low temperature, low viscosity and high corrosiveness. Offshore engineering equipment faces typical problems such as corrosion, wear, erosion, biofouling and the synergistic effect of these factors. Offshore engineering equipment is the foundation of marine economic development, and the development of advanced marine engineering equipment and high-tech ships has become a key breakthrough area for ocean development. The key moving parts of marine equipment such as ship propeller bearings, submarine buoyancy adjustment systems, underwater robot joints, plunger pumps for seawater hydraulic systems, and deep-sea drilling heave compensation devices not only face sev...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/58C23C14/02C23C14/06C23C14/16
CPCC23C14/35C23C14/165C23C14/586C23C14/0605C23C14/022C23C14/021
Inventor 汪爱英李淑钰孙丽丽郭鹏刘应瑞
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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