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A method to use plating assistant to improve the interface between carbon steel and ultratek

A technology of nickel-based alloy and plating flux, which is applied in the field of metallurgy, can solve the problems of low bonding force, poor bonding effect between steel substrate and nickel-based coating, etc., and achieves easy handling, wide drying temperature range, and not easy to reverse tide effect

Inactive Publication Date: 2010-10-27
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of this invention is to provide a kind of plating flux suitable for use in the process of hot-dip nickel-based plating, to overcome the shortcoming that the hot-dip nickel-based alloy has a poor bonding effect between the steel substrate and the nickel-based coating, and the bonding force is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Surface pretreatment of steel substrate

[0033] During the blasting process, the pressure of compressed air is controlled at 240KPa, and corundum sand with a particle size of 1000 microns is used as the abrasive. The sandblasting time should not be too long or too short. When the substrate reveals a fresh surface, the steel substrate can be sandblasted. During the sandblasting process, the spray gun should be continuously moved to avoid staying in the same place of the steel substrate for too long. After the sandblasting is completed, use an air gun to blow off the residue on the surface of the steel substrate to ensure that a fresh, clean steel substrate with a certain roughness is immersed in the flux.

[0034] Second, the use of plating flux

[0035] Immerse the steel substrate into the 5% KF and 10% KCl composite aqueous solution fluxing agent at a temperature of 70°C, and the soaking time is 4 minutes. The steel substrate should be kept vertically suspended i...

Embodiment 2

[0046] Sand blast the steel substrate first to obtain a fresh and rough steel surface, and then immerse the steel substrate in 15% KF and 30% KCl composite aqueous solution flux at a temperature of 60°C for 2 minutes. After the steel substrate is taken out from the plating flux solution, it is dried in a drying oven at 120°C for 4 hours, immersed in the nickel-based alloy plating solution, then taken out of the plating solution, and air-cooled to obtain the nickel-based alloy coating.

Embodiment 3

[0048] Sandblasting is performed on the steel substrate first to obtain a fresh and rough steel surface, and then the steel substrate is immersed in a 10% KF and 20% KCl composite aqueous solution flux at a temperature of 80°C for 3 minutes. After the steel substrate is taken out from the plating flux solution, it is dried in a drying oven at 130°C for 4 hours, immersed in the nickel-based alloy plating solution, then taken out of the plating solution, and air-cooled to obtain the nickel-based alloy coating.

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Abstract

The present invention pertains to the technical field of metallurgy and relates to a method to use plating assistant to improve the interface between carbon steel and ultratek, wherein: firstly, the steel substrate is treated by sand blasting; secondly, the treated steel substrate is soaked into the prepared plating assistant water solution a few minutes, the steel substrate is taken out and bakedto remove its moisture and crystal water; lastly it is hot dipped in ultratek. The plating assistant is KF and KCl compound water solution or KF, KCl and K2ZrF6 compound water solution. This platingassistant has no harm on ultratek plating solution. It has high stability of components, no pollution, no smoke and a wide range of baking temperature and can effectively prevent the steel substrate from being oxidized by air before dip plating. In addition, it may effectively enhance the surface activity of steel substrate, enables ultratek plating solution to quickly moisturize steel surface andreact with it and ensures a good metallurgical binding layer is obtained.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a method for improving the bonding interface between common carbon steel and nickel-based alloys by using plating flux. Background technique [0002] The current methods for preparing nickel-based coatings include thermal spraying, vacuum cladding, etc., but they all have their own limitations. For example, the nickel-based coating prepared by thermal spraying method has relatively large porosity, serious environmental pollution, and low coating quality; the equipment used for vacuum cladding is expensive, the production cycle is long, and certain elements volatilize. The present inventor has made a great breakthrough in preparing nickel-based wear-resistant and corrosion-resistant coatings with the method of hot-dip plating (a kind of nickel-based wear-resistant and corrosion-resistant alloy hot-dip plating method, application number: 200510011589.6), hot-dip nickel plating Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/02C23C2/04
Inventor 林涛高治山王立生郭志猛邵慧萍罗骥郝俊杰
Owner UNIV OF SCI & TECH BEIJING