Method for measuring corrosion performance of descaling agent

A measurement method and corrosion performance technology, which is applied in the field of determination of the corrosion performance of descaling agents, can solve problems such as the adverse effects of phosphorus compounds on the ecological environment, and achieve the effects of reducing test costs, simple test steps, and accurate test results

Inactive Publication Date: 2014-05-21
谭勇
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  • Application Information

AI Technical Summary

Problems solved by technology

The anti-scaling effect and operating temperature of organic phosphonic acids are better than those of inorganic phosphates and organic phosphates, a

Method used

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  • Method for measuring corrosion performance of descaling agent
  • Method for measuring corrosion performance of descaling agent
  • Method for measuring corrosion performance of descaling agent

Examples

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Embodiment

[0026] A kind of measuring method of corrosion performance of descaling agent that the present invention relates to, comprises the following steps:

[0027] (a) First, according to the requirements of the experiment, use a volumetric flask to prepare the acid descaling agent solution and the corrosion inhibitor solution, and the solution will be prepared on the day of the experiment;

[0028] (b) Then, wipe the test piece with filter paper first, then put it into a container filled with acetone with a boiling range of 60-90°C, remove the grease on the surface of the test piece with absorbent cotton, and then soak it in absolute ethanol for 5 minutes , further degreasing and dehydration; take out the test piece and put it on the filter paper, dry it with cold air, then wrap the test piece with filter paper, store it in a desiccator, take it out after standing for 1 hour, measure the size and weigh it, accurate to 0.1mg;

[0029] (c) Add the prepared acid descaling agent solutio...

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Abstract

The invention provides a method for measuring corrosion performance of a descaling agent. The method comprises the steps of (a) preparing an acid descaling agent solution and a corrosion inhibitor solution; (b) wiping a test block and putting the test block into a container to degrease and dewater; taking the test block out to dry, then measuring size and weight; (c) adding the acid descaling agent solution and the corrosion inhibitor solution into a glass bottle; (d) putting the glass bottle into a constant-temperature water bath, and taking the test block out to observe, wash and dry; (e) putting the test block into a container to further degrease and dewater; taking the test block out, washing residual acid away, immersing the test block into a sodium hydroxide solution, washing and putting the test block into absolute ethyl alcohol to wash and dewater for two times; taking the test block out to dry, then wrapping up the test block by using filter paper to store in a dryer for 1 hour and then weigh with precision of 0.1mg; (f) calculating a corrosion rate of an anti-scaling agent. The method is capable of quickly testing the corrosion performance of the descalling agent; meanwhile, the method is accurate in testing result and simple in testing steps; through the method, the testing cost is greatly reduced.

Description

technical field [0001] The invention relates to a method for measuring the corrosion performance of a descaling agent. Background technique [0002] Anti-scaling agent is a chemical preparation that removes scale, dirt and other stains, and is generally composed of multiple components. Industrial anti-fouling agents are mainly used to remove dirt in heat exchange equipment, boilers, etc. [0003] Common types and characteristics of anti-fouling agent: [0004] (1) Inorganic polyphosphate. This type is the earliest anti-fouling agent used, and its use has been restricted abroad. There are one or more repeated P-O-P bonds in its molecule, which can be divided into chain polyphosphate and cyclic polyphosphate. The disadvantage of inorganic polyphosphate is that it is easy to be hydrolyzed by moisture to form orthophosphate, especially at high temperature and high pH value, and it will react with divalent cations such as Ca2+, Mg2+, etc. to scale. [0005] (2) Organic phosp...

Claims

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Application Information

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IPC IPC(8): G01N5/04
Inventor 谭勇
Owner 谭勇
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