Gold-plated nail rack sent by customer with red arrow stickers pointing out spots of oxidized rust.

Remove the red arrow sticker from the gold-plated peg holder No. A1302-003 Lot:46-2.

After the sticker is removed, use PTC-06i placed at -24V reduction potential at room temperature to directly smear the oxidation rust spots on the nail frame. The oxidation marks were found to be completely removed.

After rinsing with pure water, put it into the dust cleaning agent PTC06i, at room temperature, in 40KHz ultrasonic wave, 30W/L, and shake for 3 minutes.

Take it out and rinse it with pure water. Let it dry in the shade in a clean room.

How to confirm that the gold-plated nail rack has been completely washed?
The dust cleaning agent PTC06i has a high reduction potential and electrical conductivity. When diluted to a concentration of 3/10,000, it still has a conductivity of about 750ppm (a concentration above 3/10,000 is too high to measure). When diluted to a concentration of 3/100,000, the conductivity is about 145ppm. When diluted to a concentration of 3 parts per million, the conductivity is about 14ppm.

The cleanliness standard of our company's RO pure water is below 5ppm (the RO water quality measured on site in the figure below is 3ppm). After the gold-plated nail frame is rinsed with RO pure water, it is finally rinsed with RO pure water. If the conductivity of the rinsing water is below 5ppm, it means that the residual fine dust cleaning agent PTC06i agent has been rinsed off.

After drying, put back into the original nail rack box. The original nail rack numbered paper is placed below.

Repeat the test. Take the number A1302-003 Lot: 46-1 gold-plated nail frame for testing. It was found that in addition to the oxidized rust spots pointed out by the red arrow stickers, there were also many rust spots (as pointed out by the arrows in the photo below).

Remove oxidation marks according to the above steps 1.~7. The oxidation marks were found to be completely removed.

Repeat the test. Take No. A1302-002 Lot: 50-1 gold-plated nail frame for testing.

Lot No. A1302-002: 50-1 Gold-plated nail frame with very many spots of oxidized rust.

Some oxidized rust spots can only be seen with a microscope, such as the rust spots pointed out by red arrow stickers 8 and 9.

Remove oxidation marks according to steps 1.~7. The oxidation marks were found to be completely removed.

Repeat the test:
The customer's special Highlight No. A1302-002 Lot: 50-3 gold-plated nail frame, pointed out that the pins are seriously oxidized, and hope to conduct a test.

Remove oxidation marks according to steps 1.~7. The oxidation marks were found to be completely removed.

Repeat the test: the customer's special High light number A1302-002 Lot: 50-4 gold-plated nail frame, pointed out that the pins are seriously oxidized, and hope to carry out the test.

Follow steps 1.~6. to remove oxidation marks. The oxidation marks were found to be completely removed.

Repeat the test: Customer's special High light No. A1101-004 Lot: 16-1 Egide gold-plated nail frame, pointed out that the oxidation rust is very serious, hope to test.

After inspection, there is a rust spot on the front, and there are also rust spots on the side.

Follow steps 1.~6. to remove oxidation marks. The oxidation marks were found to be completely removed.

Suggestions and discussions:
13.1 The oxidation rust spots marked on the stickers are not all marked. When removing stickers, some stickers stick more tightly and are more difficult to remove if applied to a rough surface that has been worn.
It is suggested that there is no need to mark the oxidized rust spots with arrows, but instead use the standard procedure to restore and remove each corner of the nail frame that is more likely to rust, as well as the rust spots visible to the naked eye on the surface. In this way, the tiny rust spots that cannot be found during manual inspection can be removed together.

13.2 The cleanliness standard of our company's RO pure water is below 5ppm (the RO water quality measured on site in the figure below is 3ppm). After the gold-plated nail frame is rinsed with RO pure water, it is finally rinsed with RO pure water. If the conductivity of the rinsing water is below 5ppm, it means that the residual fine dust cleaning agent PTC06i agent has been rinsed off.

If the cleanliness required by the gold-plated nail rack is very high, the final rinse can be changed to immersion rinse with 18MΩ ultrapure water (the resistance value of RO water is below 1MΩ). If the resistance value of the rinsing water is above 10MΩ, it means that the residual dust cleaning agent PTC06i agent on it has been rinsed clean.