In sandblasting, an important indicator  often tested is electrical conductivity of the object. This is to detect the soluble salt content of the object after sandblasting. Today Jinan Junda Industrial Technology Company  works with you to understand the reason.　　
 
Soluble salt is a potential threat to the object being sandblasted. It will affect the coating ability and duration of the coating.Because it will penetrate the coating, absorb external moisture and expand  inside . As time passes by, the coating will expand and crack, and we can see that it has rusted inside.
 
In the fields of ships and offshore drilling platforms, oil and gas pipelines, space shuttles, etc., the requirements for coating capabilities  are extremely strict. While it is exposed to damp water all year round or buried in the ground, the material  is prone to occur erosion. If the coating is easy to  break, it will be very troublesome and waste materials. The principle of sandblasting is the same as the principle of human face washing. Only when the face is cleaned first, the skin care products applied later can be well absorbed by the skin.Therefore, sandblasting requires high abrasives.　　
 
garnet sand is a sandblasting abrasive with a hardness between 7.0-8.0, fast cleaning speed, good cleaning effect, and the sand does not contain free silicon. There will be no dusty conditions during the operation, and there is no harm to the human body.As a professional manufacturer of garnet sand, the garnet sand of Jinan Junda  has extremely low conductivity.After sandblasting, direct coating can be operated without high-pressure water washing.