KR102453970B1 - Test method of Volatile corrosion inhibiting effect of Volatile corrosion inhibiting Film and Paper - Google Patents

Abstract

As a simple experimental equipment, the vaporization power of vaporizing rust-preventive film or vaporizable anti-rust paper is promoted at 50 degrees Celsius using a thermostat, cooled to room temperature (23+/-2 degrees Celsius), and 10 ml of glycerin solution is injected, and the By creating a high temperature and humidity environment of 90% or more at temperature and humidity, artificially creating the best conditions for rust to occur. It is an experimental method that can quickly and accurately determine the rust-preventive performance of rust-preventing paper.

Description

Volatile corrosion inhibiting effect of volatile corrosion inhibiting film and paper

The present invention relates to an experimental method of vaporizing rust preventive power of vaporizable rust preventive film or vaporizable rust preventive paper. It is the simplest and most accurate way to determine the continuation of the product, and it is a vaporization anti-rust performance measurement test method that can quickly measure the quality of a product even during long-term storage.

There are various methods for measuring the vaporization rust prevention performance of vaporization rust preventive film or vaporizable rust preventive paper. NACE TEST method (NACE TM0208-2018), TL 8105-0043 or TL 8105 0002, which are mainly used in Europe, ASTM B117,05534 according to the US defense standard (MIL spec,), according to the Japanese JIS standard (JIS Z 1535) Various methods such as , VIA TEST.KRIEG TEST are used, but most of the experimental methods require a long measurement time of more than 24 hours and appropriate measurement equipment and instruments, so there are many inconveniences as a measurement method for maintaining quality in a short time. In particular, depending on the measurement method, KRIEG TEST, VIA TEST, etc. have a large experimental error, so the result is obtained by repeating the experiment 2 to 3 times. In addition, in the case of the chlorine spray experiment according to ASTM B117, expensive experimental protection is required and the experiment It also has the disadvantage that it takes at least 7 days or more.

There are US20060162432A1 "Corrosion Test Apparatus" (registered on January 22, 2008) and CN101788521A "Metal corrosion condition on line test method and tester" as prior art for the rust prevention test of vaporizing rust inhibitor, but it is mainly a patent for measuring instruments and equipment.

Non-patented parts include the Review of Volatile Corrosion Inhibitors Evaluation Methods and Development of Testing PROTOCOL of NACE INT' L 2019 Paper No.13303. Most of the various vaporization power measuring methods presented here require expensive measuring devices or instruments and a long measuring time.

US20060162432A1 "Corrosion test apparatus" registration date: 2008,01,22) CN101788521A "Metal Corrosion condition online test method and tester" (Registration date: 2015.11/25)

NACE INT' L 2019 Paper No.13303 "Riview of Volatile Corrosion Inhibitors Evaluation Methods and Development of Testing protocol"

Most of the existing experimental methods for testing the vaporization rust preventive power require a long measurement time of 24 hours or more and appropriate measuring equipment and instruments, so there are many inconveniences as a measuring method for maintaining quality in a short time. Accordingly, KRIEG TEST, VIA TEST, etc. have a large experimental error, so the result is obtained by repeating the experiment 2 or 3 times. In addition, in the case of the chlorine spray experiment according to ASTM B117, expensive experimental protection is required and the experiment period is at least 7 Since it has the disadvantage of taking more than one day, a simpler and more economical experimental apparatus and a measuring method that can test vaporization rust prevention power within a short time by shortening the experimental measurement time are required.

It maximizes the rust prevention condition by maximizing the vaporization power of the vaporizing component of the vaporizable rust preventive film or vaporizable rust preventive paper at an appropriate temperature in a short time in a unit space. In order to find an experimental method that can measure vaporizable rust preventive power by minimizing Process of maximizing vaporization of material (S10) After cooling to room temperature (23+/-2 degrees Celsius) for 50 minutes, injecting 10 ml of a 1:2 solution of glycerin and distilled water into the Erlenmeyer flask (S20) again at 50 degrees Celsius It consists of a rust prevention step (S30) of determining whether rust occurs by heating in an oven of the figure for 40 minutes to create an adverse condition that can cause rust (S40). At this time, DIN EN 10025 was used for the metal specimen, and the measured vaporization anti-rust film or vaporizable anti-rust paper was used in the size of 2.5 cm X 15 cm.

The method for measuring the vaporizable rust preventive power of vaporizable rust preventive film or vaporizable rust preventive paper according to the present invention is heating for 1 hour to maximize the vaporization concentration of vaporizable particles inside the Erlenmeyer flask at a temperature of 50 degrees Celsius so that the vaporizable rust preventive particles are sufficiently provided in the metal particles. allowed to be installed.

In addition, after cooling at room temperature, a mixed solution of glycerin and distilled water in a ratio of 1:2 is added to maintain 90% or more of the moisture inside the Erlenmeyer flask. Conditions were set in which vaporizable rust preventive film or vaporizable rust preventive paper could exhibit vaporizable rust preventive power even under the conditions where voiceover could easily occur. In a DIN EN 10025 metal specimen with more than 90% moisture and a high carbon content in an environment of 50°C, rust occurs in about 20 minutes. increased stability.

1 is a process diagram of a vaporizable rust preventive film and vaporizable rust preventive paper of the present invention.

The experimental method will be described in detail with reference to the attached (Fig. 1).

Materials: 1000ml Erlenmeyer flask, silicone stopper, metal specimen (DIN EN 10025, diameter 1.5cm x 1.2cm cylinder), vaporizable rust preventive film or antirust paper sample (width 2.5cm x length 15cm, 2 pieces) Glycerin mixture (glycerin and water) 1:2 mixed solution), thermostat, and the experiment method of the vaporizable rust preventive film of the present invention will be described in detail.

1) Assemble the metal specimen at the bottom with the silicone stopper aligned with the inlet of the Erlenmeyer flask.

2) The metal specimen is sanded with No. 320 sandpaper, washed with water, washed again with ethanol, dried and mounted.

3) Prepare 3 pieces by attaching 2 sheets of sample vaporizable semi-blue film (width 2.5cm x length 15cm) to the azalea at the bottom 2cm of the entrance of the 1000ml Erlenmeyer flask.

4) Control Erlenmeyer flasks are prepared by mounting only metal specimens without vaporizing rust preventive film.

5) Put the triangular flask prepared in 3) and 4) in a thermostat at 50°C for 1 hour.

6) After cooling at room temperature for 50 minutes, inject 10ml of the glycerin mixture into the Erlenmeyer flask

7) Put it back in a constant temperature bath at 50 degrees Celsius for 40 minutes.

8) Take out the Erlenmeyer flask and read the level of rust occurrence based on the table (SGS RUST GRADE:EVALUATION RESULT) of the metal specimen assembled into the silicone stopper.

As can be seen from the above experimental diagram, it can be seen that there is no difference between the experimental results by the experimental method according to the present invention and the experimental results by SGS, TL8135-0043, and TL 8235-0002.

Claims (3)

When measuring the vaporization power of vaporizable rust preventive film, in order to accelerate vaporization and shorten the experiment time, place a 1000ml Erlenmeyer flask assembled with vaporizable rust preventive film and metal specimen (DIN EN 10025) in a thermostat at 50 °C for 1 hour, and then place it at room temperature ( After cooling to 23+/-2 degrees) for 50 minutes, add 10ml of glycerin solution, put it back in a thermostat at 50 degrees for 40 minutes, and then check whether or not metal rusts. delete delete

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