Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for testing gas-liquid double-phase corrosion inhibition capability

A test method, gas-liquid technology, applied in weather resistance/light resistance/corrosion resistance, measuring devices, weighing by removing certain components, etc., can solve low detection efficiency, gas-liquid two-phase corrosion, dissimilarity, etc. problem, to achieve the effect of simple test method and high detection efficiency

Pending Publication Date: 2019-12-03
沈阳防锈包装材料有限责任公司
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are closed circulating water systems in the power industry, petrochemical industry, and metallurgical industry. The temperature and flow rate of the system are different. Due to the difference in liquid flow rate and equipment structure, different fluid states are formed, and it is easy to appear gas-liquid two-phase Corrosion phenomenon; and when the equipment stops running and enters the air-conditioning state, the gas-liquid two-phase static corrosion is serious. In response to this phenomenon, a gas-liquid two-phase corrosion and scale inhibitor product appears on the market, and the performance verification of the product is only Testing and verification based on the gas-phase corrosion inhibition ability and liquid-phase corrosion inhibition ability will increase the workload and reduce the detection efficiency

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
  • Method for testing gas-liquid double-phase corrosion inhibition capability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] This embodiment provides a test method for gas-liquid two-phase corrosion inhibition ability. This embodiment includes the following devices and reagents: a constant temperature magnetic stirring oil bath, a flask, a constant pressure dropping funnel, a condenser tube, a dryer, a magnetic Stirring bar, gas-liquid two-phase corrosion and scale inhibitor, water, test piece, comparative test piece, hydrochloric acid, 1mol / L sodium hydroxide solution, acetone, absolute ethanol, silica gel desiccant.

[0067] Among them, the corrosion solution is deionized water prepared by ammonia, with a pH value of 8.5 to 9.2; both the test piece and the comparison test piece are made of Q235 carbon steel.

[0068] Pretreatment of the test piece and the comparison test piece: degrease the Q235 carbon steel test piece and the comparison test piece with acetone, scrub them clean, blow dry them with cold air, place them in a desiccator equipped with a silica gel desiccant for 4 hours, weigh (...

Embodiment 2

[0087]Referring to Example 1, the test method for the gas-liquid two-phase corrosion inhibition ability provided in this example is different in that the test piece and the comparison test piece are both made of H62 brass.

[0088] The test phenomenon shows that the liquid phase part: the comparative H62 brass test piece turns black at 0.5h, and all the contrasting H62 brass test pieces turn black at 1h. Test piece 1, test piece 2, and test piece 3 remained bright after the 168h test, without any discoloration.

[0089] Gas phase part: The H62 brass comparison test piece turned black as a whole at 0.5h, and test piece 1, test piece 2, and test piece 3 remained bright after the 168h test, without any discoloration.

[0090] The test results show that the liquid phase part: the comparative corrosion rate is 0.007mm / a, the corrosion rate of test piece 1 is 0.0025mm / a, the corrosion rate of test piece 2 is 0.0030mm / a, and the corrosion rate of test piece 3 is 0.0026 mm / a. The da...

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

PropertyMeasurementUnit
corrosion rateaaaaaaaaaa
corrosion rateaaaaaaaaaa
corrosion rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for testing gas-liquid double-phase corrosion inhibition capability. A liquid phase and a gas phase are separated to form different phase media in a form of combininga flask and a hollow gas-liquid double-phase pipe, wherein an environment in which a liquid phase is a main phase and a gas phase is an auxiliary phase is mainly simulated in the flask, the corrosionstate of the liquid phase is mainly tested, an environment in which a gas phase is a main phase and a liquid phase is an auxiliary phase is mainly simulated in the hollow gas-liquid double-phase pipe,and the corrosion state of the gas phase is mainly tested. Therefore, the liquid phase corrosion state is simulated in the flask, and the gas phase corrosion state is simulated in the hollow gas-liquid double-phase pipe, which is consistent with an air protection state of equipment in an actual industrial system and is close to an actual application state. In conclusion, the gas-phase corrosion inhibition capacity and the liquid-phase corrosion inhibition capacity of a gas-liquid double-phase corrosion scale inhibitor product are detected and verified at the same time, the detection can be carried out in an equipment application state close to the actual industrial system, the test method is simple, the detection efficiency is high, and therefore, the method is suitable for the simulationdetection of the equipment in the industrial system.

Description

technical field [0001] The invention belongs to the technical field of metal protection, and in particular relates to a test method for gas-liquid two-phase corrosion inhibition ability. Background technique [0002] Metal materials are damaged by the action of the surrounding medium, which is called metal corrosion. Metal rusting is the most common form of corrosion. During corrosion, a chemical or electrochemical heterogeneous reaction occurs at the interface of the metal, turning the metal into an oxidized (ion) state. This will significantly reduce the mechanical properties of metal materials such as strength, plasticity, and toughness, destroy the geometry of metal components, increase wear between parts, deteriorate electrical and optical physical properties, shorten the service life of equipment, and even cause disasters such as fire and explosion. sex accident. According to statistics, the annual loss of steel due to metal corrosion accounts for about 10-20% of th...

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 Applications(China)
IPC IPC(8): G01N17/00G01N5/04
CPCG01N17/006G01N5/04
Inventor 张璠李伟哲管志强沈萍林森霍慧张顺
Owner 沈阳防锈包装材料有限责任公司