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Enamel coating electrode as well as preparation method and corrosion resistance test method

A technology of coated electrodes and testing methods, applied in the field of electrochemical materials, to achieve the effects of short time consumption, flat sides, and guaranteed accuracy

Pending Publication Date: 2018-09-18
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the existing defects in detecting the corrosion resistance of enamel coatings, the present invention provides a shorter, simpler and more accurate test method for the corrosion resistance of enamel coatings

Method used

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  • Enamel coating electrode as well as preparation method and corrosion resistance test method
  • Enamel coating electrode as well as preparation method and corrosion resistance test method
  • Enamel coating electrode as well as preparation method and corrosion resistance test method

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preparation example Construction

[0046] In the present invention, any enamel coating can be used as a sample to be tested, and the method of the present invention is used to prepare an enamel coating electrode, so as to measure the corrosion resistance of the enamel coating. Further, the metal substrate of the enamel coating is any one of low carbon steel, enamel steel or copper and copper alloy steel. Furthermore, the copper alloy steel is any one of Cu-5Zn, Cu-5Sn or Cu-5Sn-5Zn. Specifically, the present invention firstly provides a method for preparing an enamel-coated electrode, comprising the following steps:

[0047] (1) Carry out cutting, grinding, grinding, water washing, absolute ethanol washing or acetone washing to the enamel coating to remove water, dry for later use;

[0048] (2) wire is welded on the surface of the metal substrate of the enamel coating after the pretreatment in step (1), and the whole body will be put into the PVC container after welding;

[0049] (3) Remove bubbles after mixi...

Embodiment 1

[0075] Preparation of enamel-coated electrode: Prepare a 12mm×12mm sample with the enamel coating on the copper substrate, and grind the edges around to make the side of the enamel coating smooth, free from devitrification and cracking. The back of the enamel coating is ground, polished, cleaned, copper core wire welded, and then put into PVC pipes. Epoxy resin and curing agent ethylenediamine are mixed at a mass ratio of 3.5:1, placed at 50°C for 10 minutes to remove air bubbles, and the mass ratio of epoxy resin to plasticizer dibutyl phthalate is 8:1. Dibutyl phthalate is added to the constant temperature mixture of epoxy resin and ethylenediamine, mixed evenly, and then poured into the PVC model, and the small bubbles around the coating are lightly picked up and removed by floating. The electrode was taken out after curing for 24 hours, polished, eluted with absolute ethanol, and dried to prepare an enamel-coated electrode.

[0076] Acid corrosion test: according to Fig...

Embodiment 2

[0078] Preparation of enamel-coated electrode: The enamel coating of carbon steel Q235 substrate is used to prepare a 12mm×12mm sample, and the edges around it are ground to make the side of the enamel coating smooth, without devitrification and cracking. The back of the enamel coating is ground, polished, cleaned, copper core wire welded, and then put into PVC pipes. Epoxy resin and curing agent ethylenediamine are mixed at a mass ratio of 4:1, placed at 50°C for 10 minutes to remove air bubbles, and the mass ratio of epoxy resin to plasticizer dibutyl phthalate is 7.8:1. Dibutyl phthalate is added to the constant temperature mixture of epoxy resin and ethylenediamine, mixed evenly, and then poured into PVC pipes, and the small bubbles around the coating are lightly picked up and removed by floating. The electrode was taken out after curing for 24 hours, polished, eluted with absolute ethanol, and dried to prepare an enamel-coated electrode.

[0079] Acid corrosion test: acc...

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Abstract

The invention belongs to the technical field of electrochemical materials, and particularly relates to an enamel coating electrode as well as a preparation method and a corrosion resistance test method. The technical problem solved by the invention is to detect the corrosion resistance of an enamel coating, and detection can be performed through an electrochemical analysis method. The test methodcomprises the following steps of preparing the enamel coating electrode firstly, then connecting and testing a polarization curve, which is in the corrosive solution system, of an enamel coating through the enamel coating electrode, an platinum electrode, a calomel reference electrode and an electrochemical analyzer, calculating the corrosion potential Ecorr and corrosion current density icorr ofthe enamel coating to obtain the corrosion rate V of the enamel coating finally. The method has the advantages of simple operation, less time consumption, more accurate result and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochemical materials, and in particular relates to an enamel coating electrode, a preparation method and a corrosion resistance test method. Background technique [0002] The enamel coating is a kind of inorganic enamel coated and fired on the surface of the metal base body. It has good metal wetting and affinity. When firing, the enamel and the metal surface form an oxidized transition layer and fuse with the metal surface. The enamel surface can prevent the corrosion of metal in various systems, play a buffer protection role, and reduce the corrosion of the metal substrate. Therefore, enamel products combine the strength of metal with the gorgeous appearance of enamel and the performance of chemical corrosion resistance. [0003] At present, the corrosion resistance of enamel coatings is mainly evaluated by soaking in boiling hot acid solution or 100g / L citric acid solution to evaluate the corrosi...

Claims

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Application Information

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IPC IPC(8): G01N17/02
CPCG01N17/02
Inventor 舒明勇钟庆东尹海英
Owner PANZHIHUA UNIV
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