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Method for acquiring iron-based material corrosion products layer by layer

A technology for corrosion products and iron-based materials, applied in the direction of analysis materials, weather resistance/light resistance/corrosion resistance, measuring devices, etc., can solve corrosion morphology damage, unfavorable metal corrosion definition, easy to destroy massive or flaky corrosion products and other problems, to achieve the effect of high selectivity, simple processing, and large water permeability

Inactive Publication Date: 2017-07-04
TECHN MONITORING CENT OF CHANGQING PETROLEUM EXPLORATION BUREAU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this sampling method has the following disadvantages: (1) the collected corrosion products are a mixture of surface and bottom corrosion products, which is not conducive to the definition of metal corrosion types; (2) sampling tools are easy to damage the corrosion morphology; (3 ) The sampling process is easy to destroy the structure of massive or flaky corrosion products

Method used

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  • Method for acquiring iron-based material corrosion products layer by layer
  • Method for acquiring iron-based material corrosion products layer by layer
  • Method for acquiring iron-based material corrosion products layer by layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The layered collection method of the corrosion product of the methanol rectifying tower inner wall of the present embodiment comprises the following steps:

[0027] Step 1, first select the corrosion product collection area of ​​the methanol rectification tower inner wall, then utilize hairbrush to carry out surface cleaning to the collection area; The material of the methanol rectification tower inner wall is 16MnR, the surface after cleaning (such as figure 1 shown);

[0028] Step 2, the acetone solution of cellulose acetate after surface cleaning in step 1 is repeatedly coated on the surface of the corrosion product collection area to form a 0.8mm thick coating layer (such as figure 2 shown), after the coating layer is naturally cured for 2.5 hours, the coating layer with a layer of corrosion products bonded (such as image 3 shown), and finally placed in a wide-mouth glass bottle, sealed and numbered for preservation; wide-mouth glass bottle

[0029] The specific...

Embodiment 2

[0037] The layered collection method of the corrosion product on the inner wall of the natural gas raw material gas pipeline in this embodiment comprises the following steps:

[0038]Step 1. First select the corrosion product collection area on the inner wall of the natural gas raw material gas pipeline, and then use a brush to clean the surface of the corrosion product collection area on the inner wall of the natural gas raw material gas pipeline; the material of the natural gas raw material gas pipeline is 20 steel;

[0039] Step 2. Repeatedly coat the acetone solution of cellulose acetate after surface cleaning in step 1 on the corrosion product surface collection area to form a 0.5 mm thick coating layer. After the coating layer is naturally cured for 2 hours, remove the adhesive The coating layer with a layer of corrosion products shall be sealed and stored in a wide-mouth glass bottle, and shall be numbered;

[0040] The specific process of repeatedly coating a 0.5mm thi...

Embodiment 3

[0046] The layered collection method of the iron-based material corrosion product on the inner wall of the oil field sewage reinjection well oil casing in this embodiment includes the following steps:

[0047] Step 1. First, select the corrosion product collection area on the inner wall of the oil field sewage reinjection well oil casing, and then use a brush to clean the surface of the corrosion product collection area of ​​the oil field sewage reinjection well oil casing; the oil field sewage reinjection well Oil casing is J55 oil pipe;

[0048] Step 2. Repeatedly coat the acetone solution of cellulose acetate cleaned in step 1 on the corrosion product surface collection area to form a 1mm thick coating layer. After the coating layer is naturally cured for 3 hours, peel off the adhesive There is a layer of coating layer of corrosion products, placed in a wide-mouth glass bottle for sealed preservation, and numbered;

[0049] The specific process of repeatedly coating a 1mm ...

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Abstract

The invention discloses a method for acquiring an iron-based material corrosion product layer by layer. The method comprises the following steps: 1), the surface of the corrosion product is repeatedly coated by an acetone solution of cellulose acetate to form a coating layer with thickness of 0.5 mm-1 mm, after the coating layer is naturally solidified, the coating layer adhered with the corrosion product is removed, and then placed in a receiving flask for sealing and preservation; and 2), the step 1) is repeated, and the coating layer adhered with the corrosion product is collected, and the corrosion product is collected layer by layer. A layered acquisition method is different from a recommend acquisition method in a SY / T 0546-1996 standard, the layered collection of the corrosion product on the surface of iron-based metal is realized, corrosion morphology of the corrosion product cannot be destroyed, the structure of block or sheet-shaped corrosion products is not destroyed, and effective cleaning of the metal surface corrosion product is realized.

Description

technical field [0001] The invention belongs to the technical field of corrosion and protection of iron-based materials, and in particular relates to a method for collecting corrosion products of iron-based materials layer by layer. Background technique [0002] Metal corrosion will significantly reduce the mechanical properties of metal materials such as strength, plasticity, and toughness, especially for iron-based materials, destroying the geometry of metal components, increasing wear between components, deteriorating physical properties such as electrical and optical, and shortening the service life of equipment. Even cause catastrophic accidents such as fire and explosion. According to statistics, the annual loss of steel due to metal corrosion accounts for about 10-20% of the steel output in that year. Indirect losses such as production stoppages and power outages caused by metal corrosion accidents are even more immeasurable. Therefore, the research and evaluation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/06G01N17/00
CPCG01N1/06G01N17/006
Inventor 裴润有梁桂海牛靖李振国宏岩张刚刚白金亮陈汉杨永霞刘峰盛哲郭煜锴王天明陈安德刘小齐李安琪吴荣宽张中垚苏大超窦海清
Owner TECHN MONITORING CENT OF CHANGQING PETROLEUM EXPLORATION BUREAU
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