Assured Testing Services performs  Corrosion Tests in Artificial Atmospheres per ISO 9227, also known as Salt Spray or Salt Fog.  The ISO 9227 Corrosion Tests in Artificial Atmospheres (also known as EN-ISO 9227 Corrosion Tests in Artificial Atmospheres) standard prescribes the equipment, the procedure, the electrolyte solution, and the conditions needed to perform the following three (3) types of Salt Spray or Salt Fog exposure tests:

 

1. Neutral Salt Spray or Salt Fog

2. Acetic Acid Salt Spray (AASS)

3. Copper Acidified Salt Spray (CASS)

 

The electrolytes used in ISO 9227 Corrosion Tests in Artificial Atmospheres exposures are:

 

1. Neutral Salt Spray – 5% sodium chloride in demineralized water, pH adjusted to 6.5 – 7.2.

2. Acetic Acid Salt Spray (AASS) – 5% sodium chloride in demineralized water, pH adjusted to 3.1 – 3.3 using glacial acetic acid.

3. Copper Acidified Salt Spray (CASS) – 5% sodium chloride, and 0.2 gm copper chloride per liter in demineralized water, pH adjusted to 3.1 – 3.3 using glacial acetic acid.

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Nominal exposure temperatures used in EN-ISO 9227 Corrosion Tests in Artificial Atmospheres testing are:

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1. Neutral Salt Spray: 35C

2. Acetic Acid Salt Spray (AASS): 35C

3. Copper Acidified Salt Spray (CASS): 50C

 

The electrolyte spray / fog is controlled such that its rate of condensation on the specimens is between 1.0 to 2.0 ml / 80 cm² / hour.

 

EN-ISO 9227 Corrosion Tests in Artificial Atmospheres references other standards which Assured Testing Services maintains on its ISO 17025 scope.  Reference documents in ISO 9227 Corrosion Tests in Artificial Atmospheres are listed here:

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ISO 4628-1, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 1: General introduction and designation system

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ISO 4628-2, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 2: Assessment of degree of blistering

 

ISO 4628-3, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 3: Assessment of degree of rusting

 

ISO 4628-4, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 4: Assessment of degree of cracking

 

ISO 4628-5, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 5: Assessment of degree of flaking

 

ISO 4628-8, Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance — Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect

 

ISO 8044, Corrosion of metals and alloys — Basic terms and definitions

 

ISO 8407, Corrosion of metals and alloys — Removal of corrosion products from corrosion test specimens

 

ISO 8993, Anodizing of aluminum and its alloys — Rating system for the evaluation of pitting corrosion — Chart method

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ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates — Rating of test specimens and manufactured articles subjected to corrosion tests

 

ISO 17872, Paints and varnishes — Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing

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The purpose of ISO 9227 Corrosion Tests in Artificial Atmospheres exposure testing is to provide a controlled accelerated corrosive environment to evaluate the relative corrosion resistance of either coated, plated or unprotected metallic substrates used in a variety of automotive, commercial, industrial, and consumer markets and infrastructure.

 

Assured Testing Services has multiple chambers available to expose test samples of various dimensions for the EN-ISO 9227 Corrosion Tests in Artificial Atmospheres Salt Spray exposure. The number of test specimens, dimensions, and duration of exposure for the test can be specified by the customer, or found on a sample part drawing detail block, or in a governing specification.

 

When exposing parts in accordance with ISO 9227 Corrosion Tests in Artificial Atmospheres Salt Spray, sample parts, components, or panels are customarily submitted in replicates for validation and comparison purposes. While the specimens are in the exposure chamber, they are usually positioned in the intended in-service orientation; in the case of panels, at an angle from 15 to 30 degrees from vertical. The duration of the test varies depending on the requirements of the specimens.

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The most recent version of EN-ISO 9227 Corrosion Tests in Artificial Atmospheres can be obtained at the link below:

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ISO 9227 Download

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