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On-site corrosion detecting method and device

A technology for corrosion detection and equipment, applied in weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problems of not considering the same chemical composition and poor corrosion resistance of materials, and achieve light weight, easy assembly, Construct simple effects

Inactive Publication Date: 2017-05-31
SINOPEC ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the manufacturing, assembly or operation of process equipment and pipelines, if they are not handled properly, the organizational state of the material will change. At the same time, the local hardness of the material due to welding is too high, welding stress and welding heat-affected zone will also cause material damage. Corrosion resistance deteriorates
So far, the design of on-site coupons has not considered the types of samples with the same chemical composition and different tissue states

Method used

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  • On-site corrosion detecting method and device
  • On-site corrosion detecting method and device
  • On-site corrosion detecting method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0107] Example 1: Take two samples of 304L and 316L samples 12 in the supply state and in the deteriorated state. Among them, the supplied state uses substrate samples whose chemical composition and supply state meet the design requirements, and the deteriorated state sample 12 is obtained from the supplied state sample 11, which is kept at 650°C for 2 hours, and air-cooled to room temperature. as per Figure 10 Install as shown.

Embodiment 2

[0108] Example 2: Take two pieces of 304L and 316L welded samples 13 each. The welded sample 13 is obtained by cutting the sample 11 into slots and then welding on both sides of the slot. The welding conditions are as follows:

[0109] ① Welding method: manual flat welding, double-sided welding and double-sided forming to ensure penetration;

[0110] ② Solder material: ER308L, ER316L;

[0111] ③ Preheating temperature: None;

[0112] ④Heat treatment after welding: none;

[0113] ⑤Welding process parameters: current 120-150A, voltage 13-16V, speed 1.5-3mm / s, Ar gas flow 8-12L / min.

[0114] After welding, the samples are as follows Figure 11 Install as shown.

[0115] Examples of equipment

[0116] Certainly, the embodiment of the device is associated with the embodiment of the above method, and the specific content may refer to each other.

[0117] combine Figure 1 to Figure 11 As shown, the first hanging method provided by the present invention is a cantilever beam ...

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Abstract

The invention provides an on-site corrosion detecting method and device. The method comprises the following steps: analyzing a corrosion environment in a position to be detected; collecting material and state information of a device in the position to be detected; selecting a sample type and a coupon rack type, and loading the selected sample on the coupon rack; arranging the loaded coupon rack in the position to be detected, and performing on-site implementation; and taking down the sample from the coupon rack, and performing corrosion evaluation on the sample. The invention has the following advantages: the device is simple in structure and convenient to assemble; multiple samples with different material and tissue states can be hung at one time; the fluid flow state on the surface of the sample conforms to the environment; the device is light in weight, and can not cause an obvious stress to a wall; and the device is convenient to mount and demount.

Description

technical field [0001] The invention relates to the technical field of corrosion detection, in particular to a method and equipment for on-site corrosion detection. Background technique [0002] At present, corrosion is an important hidden danger that endangers the safe and stable operation of industrial equipment, and successful corrosion detection on industrial equipment will bring economic benefits and immeasurable social benefits equivalent to hundreds of times the investment cost or even higher. Corrosion detection is a quantitative method. It uses a variety of technical means to determine the corrosiveness of the environment and the loss rate of metals. The purpose is to reveal the corrosion mechanism and study the corrosion phenomenon. The data obtained are the scientific basis for guiding the corrosion work. It is an effective means to evaluate the degree of corrosion. [0003] On-site coupon is a commonly used corrosion detection method, which has the advantages of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/006
Inventor 包振宇苗普李朝法刘希武
Owner SINOPEC ENG GRP CO LTD
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