Why test conductivity in sandblasting?

In sandblasting, an important indicator that is often detected is electrical conductivity, that is, the electrical conductivity of the object. This is to detect the soluble salt content of the object after blasting.

Soluble salts are a potential threat to objects being blasted. It affects the coatability of the paint and how long it takes to coat. Because the soluble salt will penetrate the coating, absorb external moisture, and expand and penetrate inside the coating. After a long time, the coating will expand and crack, and we can see that the inside has rusted.

Ships and offshore drilling platforms, oil and gas pipelines, space shuttles, etc., have extremely strong requirements for coating capabilities such as coatings. Because it is exposed to moist water all the year round or buried in the ground, it is easy to be corroded. If it is often damaged, it will be very troublesome and waste materials. The principle of sandblasting is the same as that of washing the face. Only by washing the face first can the skin care products applied later be well absorbed by the skin. Therefore, sandblasting has very high requirements on abrasives.

Garnet sand is a sandblasting abrasive with a hardness between 7.0 and 8.0, fast cleaning speed and good cleaning effect, and the sand does not contain free silicon, so there will be no dusty conditions during operation, and it is not harmful to the human body. The conductivity of garnet sand is extremely low, and it can be directly coated after sandblasting without high-pressure water washing.