Metal corrosion defect self-inspection healing repair method

A repair method and metal corrosion technology, applied in metal processing equipment, weather resistance/light resistance/corrosion resistance, measuring devices, etc., can solve the problems of increasing maintenance cycle and maintenance cost, and achieve the effect of average current distribution

Active Publication Date: 2020-09-15
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For early corrosion defects, it is often necessary to cooperate with higher corrosion detection methods to achieve repair, which indirectly increases the maintenance cycle and maintenance cost

Method used

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  • Metal corrosion defect self-inspection healing repair method
  • Metal corrosion defect self-inspection healing repair method
  • Metal corrosion defect self-inspection healing repair method

Examples

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Effect test

Embodiment 1

[0048] A repair method of self-detection and healing of metal corrosion defects is used to repair early pitting defects on the surface of stainless steel parts. The base material is 316L stainless steel. The embodiment includes the following steps: (1) Cleaning the surface of the defective workpiece, putting the workpiece to be repaired into alcohol and acetone for ultrasonic cleaning, removing surface impurities, and formulating a repair plan. (2) Select a suitable probe to carry out the restoration experiment, (3) Determine the environmental medium used for restoration, the restoration solution used in this example is 10M / L NaOH solution. (4) Detect and observe the position of the repaired surface. Figure 2-Figure 6 This is the cross-section simulation results of pitting defects with different depths and widths during the finite element simulation process of related 316L stainless steel pitting defects in this embodiment. from Figure 2-Figure 5 It can be seen that when the...

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Abstract

The invention provides a metal corrosion defect self-inspection healing repair method, and in the repair method, firstly, a to-be-repaired structural member is treated according to a service condition, then, a repair probe is selected according to a defect state of the to-be-repaired structural member, finally, self-inspection healing repair is executed for a local corrosion defect position of theto-be-repaired structural member through a microarc discharge mode by the repair probe. The repair method can realize self-inspection and self-healing for corrosion primary-stage defects, and can realize micron level corrosion defect repair healing, can perform repair healing for early-stage corrosion defects of a large-scale high-precision structural member, and consequently can effectively prolong service safety and service life of the high-precision structural member.

Description

【Technical field】 [0001] The invention relates to the technical field of repairing corrosion defects of materials, in particular to a repair method for self-detection and healing of metal corrosion defects. 【Background technique】 [0002] At present, steel structural parts are inevitably damaged by corrosion during service, and corrosion problems seriously affect the service life and safe service of structural parts. Therefore, it is very important to repair defective structural parts, especially for some large high-precision structural parts that have been in service for a long period of time, such as propellers of ships, large bearings, nuclear power plants, large chemical containers, etc. Timely repair may cause major corrosion accidents, which will bring huge losses to actual production and life. [0003] In the prior art, when repairing corrosion defects of metal structural parts, it is often only to fill in the gaps and leaks of macroscopic defects, and it is also nec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00G01N17/00
CPCB23P6/00G01N17/006B23K15/0086B23P6/007
Inventor 刘智勇孙宝壮李晓刚何业东
Owner UNIV OF SCI & TECH BEIJING
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