Reliability test Salt spray test

- Aug 24, 2018 -

Salt Spray Test


The test is simulating salt spray environment to check the corrosion resistance of coated metal or nonmetal materials. The strict level for test is determined by exposure duration.

Three types of laboratory simulating salt spray: NSS, ASS and CASS.


(1) NSS (Neutral Salt Spray) is the earliest test method and widely used recently. The salt solution concentration shall be 5% and the pH range is between 6.5 and 7.2, the test temperature of the salt spray chamber shall be maintained at 35, also sedimentation of salt solution shall be 1-2ml/80cm2/h.


(2)ASS (Acetic Acid-Salt Spray) is developed based on NSS. ASS adds some glacial acetic acid to 5% Nacl solution, to get a pH of 3, the solution becomes acid so the fog. Finally, the acidic solution can accelerate the corrosion rate to 3 times of NSS.

3) CASS (Copper-Accelerated Acetic Acid-Salt Spray) is a new method of accelerated salt spray test. The temperature in chamber is 50, the solution contacts some copper dichloride, so it can get a intense corrosion. The corrosion rate can be accelerated to about 8 times of NSS.

NTEK Service

NTEK, with its’ headquarter in Shenzhen, it is a comprehensive third-party testing and certification body. Currently we have physical and chemical testing labs in Shenzhen, Dongguan, Shanghai and other places, and we have accredited the certifications by CNAS, CPSC, CMA and other authorities. We offer a full range of testing services which cover footwear, toys, textile, clothing, leather, jewelry, battery, food contact materials, automotive parts, automotive electronics, and electrical and electronic products, etc. We can help enterprises to complete the precise control of whole industry chain from raw materials to the finished products.


Contact Information:

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Attn: Flora Li  

Company: Shenzhen NTEK Testing Technology Co., Ltd.

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