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What is a salt spray test ?

time:2016.10.29   views:548

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The salt spray (or salt fog) test is a standardized and popular corrosion test method, used to check corrosion resistance of materials and surface coatings. 

Usually, the materials to be tested are metallic (although stone, ceramics, and polymers may also be tested) and finished with a surface coating which is intended to provide a degree of corrosion protection to the underlying metal. 

Salt spray testing is an accelerated corrosion test that produces a corrosive attack to coated samples in order to evaluate (mostly comparatively) the suitability of the coating for use as a protective finish. 

The appearance of corrosion products (rust) is evaluated after a pre-determined period of time. Test duration depends on the corrosion resistance of the coating; generally, the more corrosion resistant the coating is, the longer the period of testing before the appearance of corrosion/ rust. 

The salt spray test is one of the most widespread and long established corrosion tests. ASTM B117 was the first internationally recognized salt spray standard, originally published in 1939. Other important relevant standards are ISO9227, JIS Z 2371 and ASTM G85. 

ATMARS salt spray test chamber is an ideal equipment to carry out such a test with following outstanding product features –

  • Chamber body uses imported Germany high temperature resistant material ensuring long-term usage without corrosion

  • Robust, corrosion-resistant and recyclable PVC construction

  • Ergonomic arrangement of operating panel and display instruments

  • Complete water level and water temperature protection system 

  • Precise acrylic glass nozzle in spray duct for optimum spray fog distribution which naturally fall on test samples without crystal or block


General specifications of salt spray chamber –


  • Chamber Working Volume: 60L, 270L and 800L

  • Power Supply: AC 220V 1Φ 50Hz

  • Temperature Range: 35°C±1°C~50°C±1°C

  • Test Applicable: NSS, ACSS, CASS and CORK


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