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Preparation method of Hastelloy surface coating

A technology of Hastelloy alloy and coating, which is applied in the field of preparation of Hastelloy surface coating, can solve the problems of decreased mechanical properties and corrosion resistance, limited application range, poor hydrophobicity, etc. The effect of friction and hydrophobicity

Active Publication Date: 2015-01-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some specific working environments, Hastelloy is easy to absorb harmful elements, which reduces its mechanical properties and corrosion resistance, and its poor wear resistance and poor hydrophobicity limit its application in certain industries. scope

Method used

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  • Preparation method of Hastelloy surface coating

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preparation example Construction

[0034] A kind of preparation method of Hastelloy surface coating provided by the present invention, it comprises the following steps:

[0035] Step 1. Hastelloy surface pretreatment

[0036] First, a Hastelloy alloy is provided. The type of Hastelloy is not limited, and Hastelloy C22 is used in this embodiment. The shape of the hastelloy is not limited, and it has a surface. The surface can be flat or curved. In this embodiment, the Hastelloy is a Hastelloy plate. The method for surface treatment of the Hastelloy alloy comprises the following steps:

[0037] ①Ultrasonic cleaning

[0038]First, use acetone, petroleum ether or soda ash as cleaning agents to clean the Hastelloy alloy with an ultrasonic cleaner for 10 to 30 minutes at a cleaning temperature of 15 to 35°C; then use ethanol or deionized water as cleaning agents to clean the Hastelloy alloy with Clean with an ultrasonic cleaner for 10 to 30 minutes at a cleaning temperature of 15 to 35°C.

[0039] ②Surface pol...

Embodiment 1

[0055] This embodiment provides a preparation method of Hastelloy surface coating, which mainly adopts "two-step method" - "pre-plating pure nickel layer by electroplating method + chemical composite plating Ni-P-nanoPTFE" to obtain resistance on Hastelloy surface. Abrading the corrosion-resistant hydrophobic composite coating, comprising the following steps:

[0056] Step 1. Pretreatment of Hastelloy surface

[0057] The method for carrying out pretreatment to Hastelloy surface comprises the following steps:

[0058] ①Ultrasonic cleaning

[0059] First use acetone as a cleaning agent to clean the Hastelloy alloy with an ultrasonic cleaner for 20 minutes at a temperature of 25°C; then use deionized water as a cleaning agent to clean the Hastelloy alloy with an ultrasonic cleaner for 20 minutes at a temperature of 25°C. ℃.

[0060] ②Surface polishing

[0061] Polish the Hastelloy surface after ultrasonic cleaning, inlay the Hastelloy in the resin, cure for 12 hours, and use...

Embodiment 2

[0075] Use the "two-step method" - "electroplating pure nickel layer + chemical composite plating Ni-P-nanoPTFE" to obtain a wear-resistant, corrosion-resistant and hydrophobic composite coating on the surface of Hastelloy. The steps are as follows:

[0076] Step 1. Hastelloy surface pretreatment

[0077] The method for surface pretreatment of the Hastelloy alloy comprises the following steps:

[0078] ①Ultrasonic cleaning

[0079]First use acetone as a cleaning agent to clean the Hastelloy alloy with an ultrasonic cleaner for 30 minutes at a temperature of 20°C; then use deionized water as a cleaning agent to clean the Hastelloy alloy with an ultrasonic cleaner for 30 minutes at a temperature of 20°C. ℃.

[0080] ②Surface polishing

[0081] Polish the Hastelloy surface after ultrasonic cleaning, inlay the Hastelloy in the resin, cure for 12 hours, and use a polishing machine to polish the Hastelloy until the surface is rough The degree is Ra0.6~0.3μm, the polishing time i...

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Abstract

The present invention relates to a preparation method of a Hastelloy surface coating. The method comprises the following steps: providing a piece of Hastelloy, and carrying out surface pretreatment on the piece of Hastelloy; providing a first plating solution and a nickel plate, using the piece of Hastelloy as a cathode and the nickel plate as an anode, placing the piece of Hastelloy and the nickel plate in the first plating solution for electroplating for a while, so as to form a pure nickel layer on the surface of the piece of Hastelloy; providing a composite plating solution containing a nickel phosphor plating solution and nano PTFE particles; and placing the piece of Hastelloy with pure nickel layer on the surface, heating to 85-91 DEG C, and taking out the piece of Hastelloy after a period of time. The method provided by the invention is applicable to surface treatment of Hastelloy of a variety of shapes and models, and has wide application scope.

Description

technical field [0001] The invention relates to a metal surface treatment method, in particular to a preparation method of Hastelloy surface coating. Background technique [0002] Hastelloy has high strength, high toughness, excellent corrosion resistance in various reducing media, and excellent corrosion resistance in medium concentrations of non-oxidizing sulfuric acid, phosphoric acid, high-temperature acetic acid and formic acid, etc. Therefore, it is widely used in the fields of petroleum, chemical industry and environmental protection. However, in some specific working environments, Hastelloy is easy to absorb harmful elements, which reduces its mechanical properties and corrosion resistance, and its poor wear resistance and poor hydrophobicity limit its application in certain industries. scope. In order to further improve the comprehensive properties of Hastelloy parts such as corrosion resistance, wear resistance and hydrophobicity, it is necessary to prepare funct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/00B05D5/08
Inventor 衣晓红张晨辉雒建斌
Owner TSINGHUA UNIV
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