Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A test method for simulating the corrosion of Hastelloy alloy in the environment of bromine glue

A test method, a technology that simulates Hastelloy, applied in the direction of weather resistance/light resistance/corrosion resistance, weighing and measuring devices by removing certain components, it can solve the problem of not being very corrosive, restricting production efficiency, and prolonging the production cycle and other issues to achieve good reproducibility

Inactive Publication Date: 2016-08-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these test methods mostly simulate some metals or alloys that are more prone to corrosion, or the environment in which they are located is not very corrosive. In the actual production process of bromobutyl rubber, the basic material of the synthetic container is Hastelloy alloy with strong corrosion resistance, which contains Br 2 strong corrosive environment
[0005] In the production of bromobutyl rubber, the bromine corrosion perforation phenomenon of Hastelloy alloy is particularly serious, which restricts the improvement of production efficiency, prolongs the production cycle, and increases the production cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A test method for simulating the corrosion of Hastelloy alloy in the environment of bromine glue
  • A test method for simulating the corrosion of Hastelloy alloy in the environment of bromine glue
  • A test method for simulating the corrosion of Hastelloy alloy in the environment of bromine glue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A test method for simulating the corrosion of Hastelloy alloy in bromine environment, comprising the following steps:

[0042] Step 1. First wire cut Hastelloy C-276 into a cuboid sample of 72.5mm×11.5mm×2mm, and then perform ultrasonic cleaning on the cuboid sample for 1 hour, then remove the oil on the surface with acetone, and finally Wash with deionized water, dehydrate with absolute ethanol, air-dry naturally, weigh and measure the size, and obtain the pretreated sample;

[0043] Step 2, weigh 0.1g of Br respectively 2 , 2.0g of HBr, 2.0g of H 2 The n-hexane of the butyl rubber of 0,20g and 75.9g, it is mixed and formulated with n-hexane solution, and this n-hexane solution is as dipping solution;

[0044] Step 3. Soak the pretreated sample in the above-mentioned n-hexane solution, set the soaking temperature and rotation speed, wherein the temperature is 30°C, and the rotation speed of the test piece in the solution is 100r / min;

[0045] Step 4. Prepare picklin...

Embodiment 2

[0047] The difference from Example 1 is: in step 2, the Br of 1g is weighed 2 , 0.1g of HBr, 1.0g of H 2 The butyl rubber of O, 10g and the normal hexane of 87.9g, it is mixed and formulated into normal hexane solution as impregnating solution; In step 3, immersion temperature is 40 ℃, and the morphology figure after corrosion is as follows Figure 4 shown, same as image 3 The surface corrosion of similar Hastelloy alloys is very serious, with large areas of corrosion and peeling off, and there are many deep corrosion pits, but the degree of corrosion is lower than that of image 3 This is because the temperature increases and the activity of the molecules involved in the reaction increases, which makes the corrosion more serious.

Embodiment 3

[0049] The difference from Example 1 is: in step 2, the Br of 1g is weighed 2 , 0.1g of HBr, 1.0g of H 2 The butyl rubber of 0,10g and the normal hexane of 90g, it is mixed and formulated into normal hexane solution as dipping solution; In step 3, the rotating speed of test piece in solution is 200r / min; Figure 5 shown, same as image 3 The surface corrosion of similar Hastelloy alloys is very serious, with large areas of corrosion and peeling off, and there are many deep corrosion pits, but the degree of corrosion is lower than that of image 3 This is because the speed increases, the chance of Hastelloy contacting with the corrosive medium increases, and the generated corrosion products are easier to fall off, which leads to more serious corrosion.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a test method for simulating the corrosion of Hastelloy alloy in the environment of bromine glue, and belongs to the technical field of simulation technology of corrosion of bromine glue environment. In this method, the sample is firstly pretreated, and then n-butane solution is prepared as the impregnating solution. The pretreated sample is soaked in the impregnating solution for a period of time. , Corrosion products and corrosion morphology analysis. The method of the present invention can quickly evaluate the corrosion research and corrosion resistance of materials such as Hastelloy in the environment of bromine glue, and the curve of the corrosion weight loss curve obtained by simulating the method of the present invention is consistent with the law in actual production. The corrosion appearance obtained by simulation is consistent with the corrosion appearance in actual production, and there are large-area and deep pitting pits on the surface of its sample. It has been proved through repeated tests that the results simulated by the present invention have good reproducibility.

Description

technical field [0001] The invention belongs to the simulation technical field of bromine rubber environment corrosion, and in particular relates to a test method for simulating the corrosion of Hastelloy alloy in the bromine rubber environment. Background technique [0002] Hastelloy is a high-grade nickel-based alloy with excellent corrosion resistance. It has been widely used in many fields such as petroleum, chemical industry, and environmental protection abroad. Hastelloy plates are suitable for various chemical industries containing oxidizing and reducing media. , which contains high molybdenum and chromium, which makes the alloy resistant to chloride ion corrosion, and the tungsten element contained in it further improves the corrosion resistance; at the same time, C-276 Hastelloy tube is the only one that is resistant to moisture chlorine and hypochlorous acid One of the materials corroded by salt and chlorine dioxide solution, it has remarkable corrosion resistance ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00G01N5/04
Inventor 胡松青王培王志坤吕强孙霜青王秀民
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com