Copper corrosion tester

1、 Preface

Hello user friend! Sincerely thank you for choosing the relevant products produced by Jingzhou Chuangbo Instrument Manufacturing Co., Ltd. We will serve you wholeheartedly.

2、 Overview

JCB5096-02 typeCopper corrosion testerIt is designed and manufactured in accordance with the petroleum and chemical industry standard GB/T 5096 "Copper Corrosion Test Method for Petroleum Products" of the People's Republic of China. It is suitable for determining the corrosion degree of copper in aviation gasoline, jet fuel, automotive gasoline, natural gasoline, or other hydrocarbons with a Reid vapor pressure not exceeding 124 kPa, solvent oil, kerosene, diesel, distillate fuel oil, lubricating oil, and other petroleum products.

3、 Main technical indicators

1. Working power supply: AC220V ± 10%; 50Hz

2. Temperature control range: Room temperature to 100.0 ℃

3. Temperature control accuracy: ± 0.5 ℃

4. Temperature sensor: Pt100

5. Heating power: 800W

6. Timing range: 0.01 seconds to 99 hours and 99 minutes

7. Sample hole: 4

Instructions for using the four instruments

1. Install JCB5096-02 modelCopper corrosion testerPlace it on the workbench, connect the plug wires, and install the sensor and thermometer. All switches are in the off position. Connect the power cord and be sure to have a good grounding wire.

2. Add an appropriate amount of coolant to the bath.

3. Turn on the power switch, turn on the temperature control switch, and the temperature control meter will display normally.

The upper row of the temperature controller displays the measured temperature of the bath, while the lower row shows the temperature that needs to be set. Click the SET key and directional keys<and the increase/decrease key ∧∨ to set the temperature you need.

The operation of the temperature controller can refer to the attachment - Temperature Controller Manual

After the timer switch is turned on, the timer can be set to H (hours) and M (minutes) test time values as required for the experiment. The buzzer will automatically sound at the set time to indicate that the time has passed. At this point, turn off the timer switch, and the timer display and buzzing will stop.

5. Different samples are subjected to different testing procedures:

A、 Lubricating oil, solvent oil, kerosene: Take 30 milliliters of clear, free of suspended water or water containing sample and pour it into a clean, dry test tube with a test tube clamp. Place the polished and clean copper sheet into the sample of the test tube, and place the test tube with a test tube clamp in a bath maintained at 100 ± 1 ℃. After placing it in the water bath for 3 hours ± 5 minutes, remove the test tube and inspect the copper sheet.

B、 Aviation gasoline and jet fuel: Take 30 milliliters of clear, free of suspended water or water containing sample and pour it into a clean, dry test tube. Carefully slide the test tube into the test cartridge, tighten the cartridge cover, and place the test cartridge in a bath maintained at 100 ± 1 ℃ for 2 hours ± 5 minutes. Remove the test cartridge and rinse it with tap water for a few minutes. Open the test cartridge, remove the test tube, and inspect the copper sheet.

C、 Natural gasoline: Take 30 milliliters of clear, non suspended water or water containing sample and pour it into a clean, dry test tube. Carefully slide the test tube into the test cartridge, tighten the cartridge cover, and place the test cartridge in a bath maintained at 40 ± 1 ℃ for 2 hours ± 5 minutes. Remove the test cartridge from the bath and rinse it with tap water for a few minutes. Open the test cartridge, remove the test tube, and check the copper sheet

D、 Diesel, fuel oil, and automotive gasoline: Measure 30 milliliters of clear, free of suspended water or containing water sample and pour it into a clean, dry test tube with a test tube clamp. Place the final polished and clean copper sheet into the sample of the test tube, and place the test tube with a test tube clamp in a bath maintained at 50 ± 1 ℃. After leaving it in the bath for 3 hours ± 5 minutes, remove the test tube and inspect the copper sheet

6. Inspection of copper sheets

1. Use tweezers to remove the copper sheet, wash off the sample with washing solvent, and use a quantitative filter paper to absorb the washing solvent on the copper sheet. Do not touch the copper sheet with your hands. If the copper sheet is placed in a flat observation tube, it can avoid leaving spots and dirt on the clamped copper sheet during inspection and comparison.

2. Compare the copper sheet with the corrosion standard color plate, and try to hold the copper sheet and corrosion standard color plate in a way that refracts light at a 45 ° angle for observation.

3. Determine the corrosiveness of the sample based on the grading of the corrosion standard color palette.

Classification of Corrosion Standard Color Plates

Explanation for determining corrosiveness:

When the copper sheet is between the corrosion levels of two adjacent standard color plates, the sample is judged according to the corrosion level with severe discoloration.

When the copper sheet appears in orange color darker than 1b in the standard color palette, it is considered to still belong to level 1. However, if red color is observed, the copper sheet is judged to be level 2.

3. In Level 2, purple copper sheets may be mistaken for yellow copper covered by magenta colors. To distinguish between these two levels, the copper sheets can be immersed in a washing solvent. Level 2 will appear a deep orange color, while Level 3 will not change color.

If the copper sheet gets dirty during the heating and leaching process, it needs to be retested.

If a corrosion level higher than most of the surface corrosion level of the copper sheet appears along the edges and corners of the plane of the copper sheet, the test must be repeated.

6. If two results of repeated measurements are not the same, the test shall be repeated. If the two results of the retest are still not the same, the sample shall be judged according to the corrosion level with severe discoloration.

5、 Common faults and troubleshooting methods