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Method and equipment for removal of ceramic coatings by solid co2 blasting

A ceramic coating, CO2 technology, applied in the field of removing ceramic coatings and devices by solid CO2 spraying, which can solve the problems of low efficiency, damage to the substrate, long duration, etc.

Active Publication Date: 2015-07-08
TURBOCOATING SPA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0025] The prior art of dry ice stripping developed in the previously cited patents provides coating removal methods that risk damaging the substrate and are either inefficient or require very long durations

Method used

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  • Method and equipment for removal of ceramic coatings by solid co2 blasting
  • Method and equipment for removal of ceramic coatings by solid co2 blasting
  • Method and equipment for removal of ceramic coatings by solid co2 blasting

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Embodiment Construction

[0041] The present invention relates to a method and a device for removing a ceramic protective coating 2 (ie a thermal barrier coating such as yttria partially stabilized zirconia - YPSZ) with high removal efficiency and without compromising the properties of the substrate 1 .

[0042] Removal of the ceramic coating 2 without compromising the properties of the substrate 1 was achieved by a combination of coating / substrate preheating by radiation and improved solid-state CO immediately before (Fig. 2(b)) or during (Fig. 2(a)) stripping. 2 4 injection parameters were obtained. Substrate 1 can be metal, ceramic, plastic or composite. Substrate properties not affected by the present invention are substrate thickness and roughness. The substrate thickness can vary from 1 μm to 1 m. The substrate can be rough (Ra > 9 μm) or smooth (Ra < 9 μm).

[0043] The stripping method is a single-stage process in which only solid CO 2 4 The combination of preheating during or immediately b...

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Abstract

A method for removing ceramic coatings using a special equipment without modifying the characteristics of the substrate such as roughness and thickness and able to prepare the substrate to be recoated with a new ceramic layer, is provided. The removing of the ceramic coating without damaging the substrate characteristics is obtained by a combination of coating / substrate pre-heating by irradiation during or immediately before the stripping and improved solid CO2 blasting equipment and parameters.

Description

Background technique [0001] The industrial market is concerned with the optimization of product quality and the reduction of production and environmental costs. In this competition, surface engineering is becoming more and more important because better component performance can be obtained by changing only the surface of the component. One of the main aspects of surface engineering is the application of ceramic thick coatings and ceramic thin films. A thick coating is defined as a protective layer with a thickness greater than 100 μm, while a thin film is defined as a protective layer with a thickness less than 100 μm. Ceramic thick coatings are mainly made by thermal spraying techniques such as air plasma spraying (APS), vacuum plasma spraying (VPS), suspension plasma spraying (SPS), solution precursor plasma spraying (SPPS) and high velocity oxygen fuel spraying (HVOF). Ceramic thin films are mainly applied by chemical vapor deposition (CVD) and physical vapor deposition (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24C1/00B24C1/08
CPCB24C1/003B24C1/08
Inventor A·斯科利瓦尼C·乔立B·A·阿莱格里尼
Owner TURBOCOATING SPA
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