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Instrument for nitric acid method intergranular corrosion test of stainless steel and using method

A technology of intergranular corrosion and nitric acid method, applied in chemical instruments and methods, separation methods, steam condensation, etc., can solve the problems of metal losing mechanical properties, metal turning into powder, etc., and achieve the effect of ensuring accuracy

Pending Publication Date: 2021-12-17
THERMAL POWER TECH RES INST OF CHINA DATANG CORP SCI & TECH RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lose the mechanical properties of the metal, causing the whole metal to become powder

Method used

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  • Instrument for nitric acid method intergranular corrosion test of stainless steel and using method
  • Instrument for nitric acid method intergranular corrosion test of stainless steel and using method

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Embodiment Construction

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] see Figure 1-2 shown;

[0039] A kind of stainless steel nitric acid method intergranular corrosion test instrument described in the embodiment of the present invention, this instrument comprises:

[0040] Ground Erlenmeyer flask 1;

[0041] Condenser 2, the bottom end of the condenser 2 is adapted to the bottleneck 11 of the ground-mouthed Erlenmeyer flask 1;

[0042] The condenser 2 includes a straight pipe 21 and a condensation pipe 22 arranged in the straight pipe 21, the top of the straight pipe 21 has an air outlet 211, and the bottom end of the straight pipe 21 has a condensation port 212, and the condensation port 212 extends Enter in the bottleneck 11 of grinding mouth Erlenmeyer flask 1;

[0043] The condensing pipe 22 inclu...

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Abstract

The invention discloses an instrument for a nitric acid method intergranular corrosion test of stainless steel and a using method. The instrument comprises a ground conical flask, and a condenser, wherein the bottom end of the condenser is matched with an opening of the ground conical flask; the condenser comprises a straight pipe and a condensation pipe arranged in the straight pipe, a gas outlet is formed in the top end of the straight pipe, a condensation opening is formed in the bottom end of the straight pipe, and the condensation opening extends into the opening of the ground conical flask; and the condensation pipe comprises a straight condensation pipe and a threaded coil pipe, the threaded coil pipe is coiled on the straight condensation pipe, the bottom end of the threaded coil pipe is communicated with the bottom end of the straight condensation pipe, and the joint of the threaded coil pipe and the straight condensation pipe is in a hook shape. The instrument can meet the standard requirements of the nitric acid method intergranular corrosion test, and ensures the accuracy, reliability and effectiveness of the intergranular corrosion test.

Description

technical field [0001] The invention relates to the technical field of intergranular corrosion test, in particular to an instrument for stainless steel nitric acid method intergranular corrosion test and a use method. Background technique [0002] 18-8 type austenitic stainless steel has high chemical stability in many media, but after heating in the range of 400-800 ° C or cooling slowly in this temperature range, it is prone to intergranular corrosion in certain corrosive media. Intergranular corrosion is characterized by etching along grain boundaries. Make the metal lose its mechanical properties, causing the whole metal to become powder. In order to consider the intergranular corrosion resistance of materials in specific environments, materials can be evaluated by intergranular corrosion tests. [0003] The intergranular corrosion test is an accelerated metal corrosion test method for testing the intergranular corrosion sensitivity of metal materials under specific me...

Claims

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Application Information

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IPC IPC(8): B01D5/00
CPCB01D5/0006B01D5/0012B01D5/006
Inventor 张学星曾辉董树青马志宝商振强蒙殿武
Owner THERMAL POWER TECH RES INST OF CHINA DATANG CORP SCI & TECH RES INST
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