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Salt spray test
2019.10.17

Many enterprise products need to simulate the damage caused by the surrounding climate of the ocean. The salt spray test simulates this phenomenon, so the testing equipment--the salt spray test chamber came into being.

The salt spray test is divided into two types: neutral salt spray and acid salt spray. The difference is that the standard is different from the test method. The salt spray test is a kind of artificial simulated salt spray environment condition mainly created by salt spray test equipment. Environmental test to assess the corrosion resistance of products or metal materials.

The salt spray test standard specifies the salt spray test conditions, such as temperature, humidity, sodium chloride solution concentration and pH value, and also provides technical requirements for the performance of the salt spray test chamber. The methods for determining the salt spray test results include: rating determination method, weighing determination method, corrosion occurrence determination method, and corrosion data statistical analysis method. The products that need to be tested for salt spray are mainly metal products, and the corrosion resistance of the products is examined by inspection.

corrosion

Corrosion is the destruction or deterioration of a material or its properties caused by the environment. Most of the corrosion occurs in the atmosphere, which contains corrosive components and corrosive factors such as oxygen, humidity, temperature changes, and pollutants. Salt spray corrosion is a common and most destructive atmospheric corrosion. The salt spray mentioned here refers to the atmosphere of chloride. Its main corrosive component is the chloride salt in the ocean, sodium chloride, which is mainly derived from the ocean and the saline-alkali areas in the interior. The corrosion of the surface of the metal material by the salt spray is caused by the electrochemical reaction of the chloride layer which penetrates the metal surface and the protective layer and the internal metal. At the same time, chloride ions contain a certain hydration energy, which is easily adsorbed on the pores of the metal surface, and the cracks are displaced and replace the oxygen in the oxide layer, turning the insoluble oxide into a soluble chloride, and the passivated surface becomes a lively surface. . Causes a bad reaction to the product.

Salt spray

Salt spray is a dispersion system consisting of tiny droplets of salt in the atmosphere. It is one of the three series of artificial environment, named "NSS" and "CASS". It is the most common type of artificial weather protection. testing method.

Box material: The test box is made of imported PVC reinforced hard plastic board. The surface is smooth and flat, and it is resistant to aging and corrosion. It is easy to clean and has no leakage. The glass fiber reinforced plastic material has surface fading and fiberized material structure due to time.

Cover material: Fully transparent imported impact-resistant sheet manufacturing, easy to observe test samples under test conditions

Salt water tank material: imported PVC board, large salt water tank design, to stop the test due to lack of salt water

High pressure air tube material: copper tube or rubber tube

Saturated air tank: imported high-grade stainless steel (SUS304) board; using Henry's law, it is heated and humidified, and provides the humidity required for the experiment.

(Saturated air bucket function: heating, humidification and oil filtration for compressed air)

All pipes in the test box are made of thickened fluorosilicone rubber tubes, which can remain unaged and cracked for 15 years.

experiment method

Can be tested:

Neutral salt spray test (LRHS-108-RY)

Salt spray test (LRHS-270-RY)

Acetate spray test (LRHS-412-RY)

Copper accelerated vinegar instinct test

High temperature damp heat test

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