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The Benefits Of Salt Spray Testing

By Alfie Green

Salt spray testing refers to the standardised method of testing the corrosion resistance of components and coated samples.

Coatings, which can be organic i.e. paint or powder coatings or inorganic such as galvanising, anodising or plating, are used to protect components that are made from materials such as zinc or steel from corrosion. To predict the suitability of the coating as a protective finish the salt spray test is often used. It can also help to determine the service life of that particular component.

Specimens are subjected to either a continuous or intermittent fine mist spray, which is made up of five per cent salt solution, to decide at which point they start to corrode.

This form of testing has been used for over 90 years to determine the degree of protection afforded by both inorganic and organic coatings on a metallic substrate.

The most common form of this type of testing is the neutral salt spray test, where the procedure can last for anything from just eight hours up to two thousand five hundred hours – depending on the product and specification. This test works by atomising a salt solution into uniform droplets on specimens suspended or supported from 15-30 degrees from the vertical.

There are many different advantages to using the salt spray test and one of the most interesting is that it is a multi material test – i.e. it can be used to test not only the bare material but also coated or painted materials.

Compared to the natural environment the test duration is short, a standardised material is required and it is relatively cost effective. It can also be used to test larger samples.

Whilst being simple to perform, salt spray testing requires careful control to ensure that the results can be understandable to everyone. This also means it is a useful tool for marketing purposes, although the constraints of the testing method should be explained in any marketing materials in order to avoid misinterpretation or misunderstanding.

Learn more about salt spray testing. Stop by the Rotech Labs site where you can find out all about the salt spray test and how it can help your business.

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Article Citation
MLA Style Citation:
Green, Alfie "The Benefits Of Salt Spray Testing." The Benefits Of Salt Spray Testing. 11 Jul. 2010. 11 Aug 2014 <>.

APA Style Citation:
Green, A (2010, July 11). The Benefits Of Salt Spray Testing. Retrieved August 11, 2014, from

Chicago Style Citation:
Green, Alfie "The Benefits Of Salt Spray Testing"

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