The salt spray (or salt fog) test is a standardized and popular corrosion test method, used to ASTM B was the first internationally recognized salt spray standard, originally published in Other important relevant standards are. Designation: B – 07a Standard Practice for Operating Salt Spray (Fog) Apparatus1 This standard is issued under the?xed designation B. ASTM B Testing, also known as a Standard Practice for Operating Salt ASTM B Testing requires controls over many operational parameters such as: .

Author: Mozuru Voodookora
Country: Eritrea
Language: English (Spanish)
Genre: Environment
Published (Last): 17 February 2005
Pages: 188
PDF File Size: 19.10 Mb
ePub File Size: 8.5 Mb
ISBN: 559-6-49586-614-7
Downloads: 32215
Price: Free* [*Free Regsitration Required]
Uploader: Grom

Retrieved from ” https: Salt spray testing is popular because it is relatively inexpensive, quick, well standardized, and reasonably repeatable. Nozzles are not necessarily located at one end, but may be ashm in the center and can also be directed vertically up through a suitable tower. For this purpose Test Method B and Practice G 85 are available, which are also considered by some to be superior for comparison of chemically treated aluminum asym, phosphated, or anodizedalthough?

Requirements are agreed between customer and manufacturer. This does not apply to running tap water. This may be accomplished by placing the apparatus in a constant-temperature b117-07q, but may also be achieved by surrounding the basic chamber of a jacket containing water or air at a controlled temperature.

Salt spray test

Conditions in the Salt Spray Chamber Bare metal qstm not be used. The principle application b117-07a the salt spray test is therefore enabling quick comparisons to be made between actual and expected corrosion resistance. Test solution tank L. 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.


Accessories for Corrosion Testing. These acidified test solutions generally have a pH of 3. Hot-dip galvanizing produces zinc carbonates when exposed to a natural environment, thus protecting the coating metal and reducing the corrosion rate. Walk-in chambers are usually constructed with a sloping ceiling. The chamber has the following features: It is preferred that control panels be provided that bracket the asm test specimen performance. NOTE 1—Should it be desirable to cut test specimens from parts or from preplated, painted, or otherwise coated steel sheet, the cut edges shall be protected by coating them with paint, wax, adtm, or other effective media so that the development of a galvanic b171-07a between such edges and the adjacent plated or otherwise coated metal surfaces, is prevented.


SAL 3000-FL

It should be noted there is usually not a direct relation between salt spray fog resistance and resistance to corrosion in other media, because the chemistry of the reactions, including the formation of?

Halides Bromide, Fluoride, and Iodide other than Chloride shall constitute less than 0. Dashed chart lines indicate temperature tolerance limits. When the pH of the salt solution is adjusted at room temperature, it is therefore necessary to adjust it below 6.

Each set point and its tolerance represents an operational control point for equilibrium conditions at a single location in the cabinet which may not necessarily represent the uniformity of conditions throughout the cabinet. The salt spray test has little application in predicting how materials or surface coatings will resist corrosion in the real-world, because it does not create, replicate or accelerate real-world corrosive conditions.

This is followed by 0. Slotted wooden strips are suitable for the support of? Daily checking of testing parameters is necessary to show compliance with the standards, so records shall be maintained accordingly.

Spraying of test solution. However, these testing standards neither provide information of testing periods for the sstm to be evaluated, nor the appearance of corrosion products in form of salts.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Painted surfaces with an underlying hot-dip galvanized coating can be tested according to this method.


SaliCORR® ASTM B Sodium Chloride

The sodium chloride concentration may also be determined using a suitable salinity meter for b11707a, utilizing a sodium ion-selective glass electrode or colorimetrically as follows. The conditions of making the scratch shall be as de? Synthetic seawater solutions are also commonly specified by some companies and standards.

The number of nozzles depends on type and capacity and is related to the area of the test space. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Table 2 shows the temperature, at different pressures, that are commonly used to offset the cooling effect of expansion to atmospheric pressure.

Please find more details at www. For this reason the salt spray test is most often deployed in a quality audit role, where, for example, it can be used to check the effectiveness of a production process, such as the surface coating of a metallic part.

The fallout rate should be measured for 16 hours and it must range from 1. The most commonly used type is made of plastic. This is followed by 1. B In order to ensure that the proper salt concentration was achieved when mixing the solution, it is recommended that the solution be checked with either a salimeter hydrometer or speci? It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Care shall be taken that specimens are not recontaminated after cleaning by excessive or careless handling.