Q：How to test the difference between the antirust ability of UTA and that of other factories in a simple way?
A： The simplest way is to fill two paper cups with clear water and then add a small spoon of edible salt. At the same time, put the hinge of our company into two paper cups respectively. One day later, you can see whether there is rust on the surface of the two hinges produced by different companies.
Q：What causes the green hairs on the hinge surface under the cabinet sink?
A：The hinge is made of cold-rolled steel, so the chemical change is basically rust, and the green hair is produced because: (1) the adhesive used in the cabinet emits a large amount of acid or other particulate matter and smell in the air, and these things eventually attach themselves to the seam in the hinge and then come into being; (2) the acid or alkaline cleaner is used in the cleaning process; (3) the formaldehyde removal cleaner is used. Green hair can be removed by wiping. Neutral glass glue is recommended.
Q：What is the difference between neutral salt spray and acid test? Is there any difference?
A：The neutral salt spray test is internationally recognized, and the most common anti rust tests include 24-hour and 48-hour. However, because the testing time is too long, some companies will use acid test to speed up and shorten the time, in order to get the rust proof result in the shortest time. The time ratio of neutral to acid is 1:8. At present, UTA hinge can pass the neutral salt spray test by 72 hours and at level 9.
