Salt Fog (Spray) Testing

salt fog testing
Salt Fog (Spray) Testing

Corrosion of American infrastructure accounts for the loss of millions of dollars annually. Products ranging from hand tools to bridges must combat this phenomenon through proper design and coating protection. Laboratory accelerated corrosion testing enables clients to evaluate new designs and coatings in a controlled environment prior to release in to the real world.


Reasons to Consider Running a Salt Fog Test:

Salt fog testing is one of the most commonly used forms of corrosion testing. The salt fog testing has proven effective at determining the integrity and quality of the corrosive resistance of various metals or finishes.

A standard 5% solution of NaCl, known as NSS or neutral salt spray is chosen based on the specific coating being evaluated. A number of corrosion testing standards (see below under Test Methods) will require a manufacturer to satisfy certain specifications.

Here are just a few examples of tests that can be performed in conjunction with salt spray testing:

  • Determine the corrosion creepage when a coated surface is scratched (as per ASTM D1654).
  • Measure coating adhesion (as per ASTM D3359).
  • Measure the degree of blistering (as per ASTM D714).
  • Determine the degree of rusting (as per ASTM D610).

How Does Salt Fog Testing Correlate to the Real World

There is no direct correlation between a laboratory salt fog test and real world conditions. This is difficult to predict because substrates and coatings are always evolving, and outdoor environments are inherently variable on a day to day or location to location basis.


Why Use Applied Technical Services

ATS provides a state of the art test facility with the most up-to-date equipment, and a very knowledgeable staff that will provide exceptional customer service and insight on your testing. ATS also offers a detailed report that can contain any or all of the information below:

  • Detailed photographs of the samples (at any specified interval).
  • Chamber conditions (Examples: pH / Specific Gravity / Temperature).
  • All calibration and compliance data of the salt fog chamber and any supporting equipment.
  • Applied Technical Services laboratory accreditations, and certifications for the requested testing.

Test Methods

Below is a list of some of the test methods that ATS can perform:

  Association  
  American Society for Testing and Materials (ASTM)  
  • ▪ ASTM B117 Salt Fog
  • ▪ ASTM D870 Water Immersion
  • ▪ ASTM D2247 Condensing RH
  • ▪ ASTM G85 A2 Cyclic Acidified Salt Fog
 
  • ▪ ASTM B368 CASS (Copper Accelerated Salt Fog)
  • ▪ ASTM D1735 Fogging RH
  • ▪ ASTM G85 A1 Acetic Acid Salt Fog
  • ▪ ASTM G85 A3 SWATT (Synthetic Sea Water Fog)
  US Military Standards (MIL)  
  • ▪ MIL STD 202 Method 101 Salt Fog
  • ▪ MIL STD 810 Method 509.4 Salt Fog
  • ▪ MIL STD 810 Method 507.4 Humidity
 
  • ▪ MIL STD 883 Method 1009 Salt Fog
  • ▪ MIL STD 1344 A Method 1000 Salt Fog
  • ▪ MIL A 8625 Salt Fog
  International Standards Organization (ISO)  
  • ▪ ISO 9227 Salt Fog
  • ▪ ISO 9227 Acetic Acid Salt Fog
 
  • ▪ ISO 7253
  • ▪ ISO 9227 CASS (Copper Accelerated Salt Fog)
  German Standards (DIN)  
  • ▪ DIN 50021 Salt Fog
  • ▪ DIN 50017 Condensing RH
  • ▪ DIN EN ISO 2409 Cross Cut Test
 
  • ▪ DIN 50907
  • ▪ DIN EN ISO 3892 Chemical Conversion Coatings
  Japanese Standards  
  • ▪ JIS Z 2371 Salt Fog
  • ▪ JIS H 8502 CASS Testing
  • ▪ JIS H 8681 CASS Testing
  • ▪ JIS Z 0237 Adhesive Tape
 
  • ▪ JIS H 8502 Corrosion Resistance
  • ▪ JIS H 8681 Alkali Resistance
  • ▪ JIS H 10007 Humidity
  • ▪ JIS K 5600 Humidity
  Society of Automotive Engineers  
  • ▪ SAE J 2334 Cyclic Accelerated Corrosion Test
  • ▪ SAE J 1389 Corrosion Test for Insulation
  • ▪ SAE J 575 3.4
 
  • ▪ SAE J 400 Gravelometer
  • ▪ SAE J 575 3.3 Dust
  • ▪ SAE J 1563
  British Standards (BS)  
  • ▪ BS 7479
  • ▪ BS AU 148 P2
  • ▪ BS 2011 P2.1
 
  • ▪ BS 7479 AASS
  • ▪ BS 7479 CASS
  • ▪ BS 5466 P 1,2, & 3
  Chrysler Standards  
  • ▪ PS-10378
  • ▪ CS Corrosion
 
  • ▪ PS-Plating
  • ▪ MS-10783
  Ford Standards  
  • ▪ FLTM B1-103 Salt Spray
  • ▪ Ford BQ5-1 CASS
 
  • ▪ WSK-M2P157 Salt Spray
  • ▪ FLTM BO 116 Fogging
  GM Standards  
  • ▪ GM 4298P Salt Fog
  • ▪ GM 4466P Acetic Acid Salt Fog
  • ▪ GM 9540P Cyclic Accelerated Corrosion Test
 
  • ▪ GM 4465P Fogging RH
  • ▪ GM 4476P CASS
  • ▪ GMW 14872 Cyclic Accelerated Corrosion Test
  Nissan Standards  
  • ▪ NES M0138 CASS
 
  • ▪ NES M 0140 Salt Spray Testing

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