CN-117721410-B - Anticorrosive coating and preparation method thereof

CN117721410BCN 117721410 BCN117721410 BCN 117721410BCN-117721410-B

Abstract

The invention relates to the field of coatings, in particular to an anti-corrosion coating and a preparation method thereof, wherein the anti-corrosion coating comprises a connecting layer, a transition layer and a Mo-Cr-C functional layer, the connecting layer is used for being connected with a base material, the transition layer is coated on one side of the connecting layer, which is far away from the base material, the Mo-Cr-C functional layer is coated on one side of the transition layer, which is far away from the connecting layer, so as to connect the Mo-Cr-C functional layer and the connecting layer through the transition layer, wherein the thickness of the Mo-Cr-C functional layer is 1.3-3.8 mu m, and the percentage ratio of atoms in the Mo-Cr-C functional layer is 28% -36%, 22% -40% Cr and 32% -42%. Can improve the corrosion resistance, wear resistance and antifriction property of marine equipment.

Inventors

LIU GANG
WANG HAO
Ren Haoxiong
HU XIAOGANG
QIU LONGSHI

Assignees

西安稀有金属材料研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20231215

Claims (9)

1. A corrosion-resistant coating, the corrosion-resistant coating comprising: a connection layer for connection with a substrate; The transition layer is coated on one side of the connecting layer, which is away from the base material; the Mo-Cr-C functional layer is coated on one side of the transition layer, which is away from the connecting layer, so as to connect the Mo-Cr-C functional layer and the connecting layer through the transition layer; wherein the thickness of the Mo-Cr-C functional layer is 1.3-3.8 mu m, and the percentage ratio of atoms in the Mo-Cr-C functional layer is 28% or less and 36% or less, 22% or less and 40% or less and 32% or less and 42% or less; the thickness of the transition layer is 0.9-2.2 mu m, the transition layer comprises a first sub-transition layer and a second sub-transition layer which are alternately arranged, the first sub-transition layer is a Mo-Cr-C transition layer, and the second sub-transition layer is a Mo-Cr transition layer; Wherein the thickness of the first sub-transition layer is 0.06-0.09 mu m, the atomic percentage ratio of the first sub-transition layer is 24-38%, 15-43% Cr, 33-47% C, the thickness of the second sub-transition layer is 0.12-0.25 mu m, and the atomic percentage ratio of the second sub-transition layer is 42-73% Mo, 27-58% Cr.
2. The corrosion protection coating according to claim 1, wherein the thickness of the Mo-Cr-C functional layer is 2 μm to 3 μm, and the percentage ratio of atoms in the Mo-Cr-C functional layer is 30% or less and 32% or less, 28% or less and 30% or less and 38% or less and 42% or less.
3. The corrosion protection coating of claim 1, wherein the tie layer is a Mo-Cr tie layer having a thickness of 0.8 μm to 1.3 μm, the Mo-Cr tie layer having an atomic percentage of 41% Mo 77% 23% Cr 59%.
4. The corrosion protection coating of claim 1, wherein the corrosion protection coating has a hardness of 27.4GPa or greater and a bonding force between the corrosion protection coating and the substrate of 80N or greater.
5. The corrosion protection coating of claim 4, wherein the corrosion protection coating has a coefficient of friction of 0.12 or less, a wear rate of 8.4 x 10 -8 mm 3 /m-N or less, and a corrosion weight gain of 0.17mg/cm 2 or less in a seawater environment.
6. A method of preparing an anti-corrosion coating, the method comprising: forming a connection layer on a substrate; forming a transition layer on one side of the connecting layer away from the base material; Depositing a Mo-Cr-C functional layer on one side of the transition layer, which is far away from the connecting layer, wherein the percentage ratio of atoms in the Mo-Cr-C functional layer is 28 percent-36 percent, 22 percent-40 percent and 32 percent-42 percent; the thickness of the transition layer is 0.9-2.2 mu m, the transition layer comprises a first sub-transition layer and a second sub-transition layer which are alternately arranged, the first sub-transition layer is a Mo-Cr-C transition layer, and the second sub-transition layer is a Mo-Cr transition layer; Wherein the thickness of the first sub-transition layer is 0.06-0.09 mu m, the atomic percentage ratio of the first sub-transition layer is 24-38%, 15-43% Cr, 33-47% C, the thickness of the second sub-transition layer is 0.12-0.25 mu m, and the atomic percentage ratio of the second sub-transition layer is 42-73% Mo, 27-58% Cr.
7. The method of claim 6, wherein prior to forming the tie layer on the substrate, further comprising: Polishing the surface of a substrate, carrying out ultrasonic cleaning and drying, placing the metal substrate into a coating machine after drying, vacuumizing to 2.0 multiplied by 10 -3 Pa ~ 4.0×10 -3 Pa, heating to 250-350 ℃, and preserving heat for a first preset time; and (3) carrying out argon ion glow cleaning on the substrate for a second preset time in an argon environment, and then carrying out ion bombardment on the substrate for 3-5 min.
8. The method of claim 6, wherein forming a tie layer on the substrate comprises: In an argon atmosphere, preparing a Mo-Cr connecting layer by adopting a magnetron sputtering Mo target and an arc Mo-Cr target through codeposition, wherein the argon pressure is 1.1Pa-1.3Pa, the Mo target current is 30A-40A, the Mo-Cr target current is 60A-70A, the bias voltage is 80V-100V, and the deposition time is 20-30 min; forming a transition layer on a side of the connection layer facing away from the substrate, comprising: The method comprises the steps of alternately preparing a first sub-transition layer and a second sub-transition layer, wherein the preparation of the first sub-transition layer comprises the step of preparing the Mo-Cr-C transition layer by adopting a magnetron sputtering Mo target and an arc Mo-Cr target to be co-deposited in an argon and acetylene mixed atmosphere, wherein the total air pressure of the argon and acetylene mixed atmosphere is 1.4 Pa-1.6 Pa, the partial pressure ratio of the argon and the acetylene is 3-6, the current of the Mo target is 20-30A, the current of the Mo-Cr target is 50A-60A, the bias voltage is 50V-90V, the deposition time is 2-6 min, the preparation of the second sub-transition layer comprises the step of preparing the Mo-Cr layer in the transition layer by adopting the magnetron sputtering Mo target and the arc Mo-Cr target to be co-deposited in the argon atmosphere, the argon air pressure is 1.1Pa-1.3Pa, the current of the Mo target is 30A-40A, the current of the Mo-Cr target is 60A-70V, the bias voltage is 75V-125V, and the deposition time is 3-min min.
9. The method of claim 6, wherein depositing a Mo-Cr-C functional layer on a side of the transition layer facing away from the connection layer comprises: And preparing the Mo-Cr-C functional layer by adopting a magnetron sputtering Mo target and an arc Mo-Cr target to carry out codeposition in an argon and acetylene mixed atmosphere, wherein the total air pressure of the argon and acetylene mixed atmosphere is 1.4 Pa-1.6 Pa, the partial pressure ratio of the argon to the acetylene is 3-6, the current of the Mo target is 20A-30A, the current of the Mo-Cr target is 50A-60A, the bias voltage is 100V-150V, and the deposition time is 40 min-120 min.

Description

Anticorrosive coating and preparation method thereof Technical Field The disclosure relates to the technical field of coatings, in particular to an anti-corrosion coating and a preparation method thereof. Background Marine equipment is operated in a seawater environment for a long time, and chloride ions in the seawater can corrode the marine equipment. Corrosion products can cause friction, sticking, or even "seizure" of parts on marine equipment, thereby affecting the life and safety of the marine installation. And when the marine equipment is overhauled, the seized parts can be destroyed and disassembled finally, so that the overhauling cost and difficulty of the marine equipment are obviously increased. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art. Disclosure of Invention The aim of the present disclosure is to provide an anti-corrosion coating and a preparation method thereof, thereby improving the anti-corrosion performance of marine equipment to at least a certain extent. According to one aspect of the present disclosure, there is provided a corrosion-resistant coating comprising: a connection layer for connection with a substrate; The transition layer is coated on one side of the connecting layer, which is away from the base material; the Mo-Cr-C functional layer is coated on one side of the transition layer, which is away from the connecting layer, so as to connect the Mo-Cr-C functional layer and the connecting layer through the transition layer; Wherein the thickness of the Mo-Cr-C functional layer is 1.3-3.8 mu m, and the percentage ratio of atoms in the Mo-Cr-C functional layer is 28% or less and 36% or less, 22% or less and 40% or less and 32% or less and 42% or less. According to an embodiment of the present disclosure, the thickness of the mo—cr—c functional layer is 2 μm to 3 μm. According to one embodiment of the present disclosure, the percentage ratio of atoms in the Mo-Cr-C functional layer is 30% or less and 32% or less of Mo, 28% or less and 30% or less of Cr, 38% or less and 42% or less. According to an embodiment of the present disclosure, the connection layer is a Mo-Cr connection layer having a thickness of 0.8 μm to 1.3 μm, and the percentage of atoms in the Mo-Cr connection layer is 41% or less Mo 77% or less, 23% or less Cr 59% or less. According to an embodiment of the disclosure, the thickness of the transition layer is 0.9 μm-2.2 μm, the transition layer comprises a first sub-transition layer and a second sub-transition layer which are alternately arranged, the first sub-transition layer is a Mo-Cr-C transition layer, and the second sub-transition layer is a Mo-Cr transition layer; Wherein the thickness of the first sub-transition layer is 0.06-0.09 mu m, the atomic percentage ratio of the first sub-transition layer is 24-38%, 15-43% Cr, 33-47% C, the thickness of the second sub-transition layer is 0.12-0.25 mu m, and the atomic percentage ratio of the second sub-transition layer is 42-73% Mo, 27-58% Cr. According to one embodiment of the present disclosure, the hardness of the anti-corrosive coating is 27.4GPa or more, and the bonding force between the anti-corrosive coating and the substrate is 80N or more. According to an embodiment of the present disclosure, the corrosion-resistant coating has a coefficient of friction of 0.12 or less, a wear rate of 8.4X10 -8mm3/mN or less, and a corrosion weight gain of 0.17mg/cm 2 or less in a seawater environment. According to another aspect of the present disclosure, there is provided a method of preparing an anti-corrosive coating, the method comprising: forming a connection layer on a substrate; forming a transition layer on one side of the connecting layer away from the base material; And depositing a Mo-Cr-C functional layer on one side of the transition layer, which is far away from the connecting layer, wherein the percentage ratio of atoms in the Mo-Cr-C functional layer is 28 percent-36 percent, 22 percent-40 percent and 32 percent-42 percent. According to an embodiment of the disclosure, before the forming of the connection layer on the substrate, the method further includes: Polishing the surface of a substrate, carrying out ultrasonic cleaning and drying, placing the metal substrate into a coating machine after drying, vacuumizing to 2.0 multiplied by 10 -3～4.0×10-3 Pa, heating to 250-350 ℃, and preserving heat for a first preset time; and (3) carrying out argon ion glow cleaning on the substrate for a second preset time in an argon environment, and then carrying out ion bombardment on the substrate for 3-5 min. According to one embodiment of the present disclosure, forming a connection layer on a substrate includes: In an argon atmosphere, preparing a Mo-Cr connecting layer by adopting a magnetro