ASTM A90/A90M(). Standard Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings. ASTM A ZINC PLATING WEIGHT ON STEEL. This test method covers procedures for determining the weight [mass] of coating on iron or steel sheet, wire, and. A. ASTM A90 – Standards Test Method for Weight of Coating on F. ASTM A — Steel Sheet, Zinc Coated (Galvanized) or Zinc-Iron Alloy.
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A fume hood is recommended for large numbers of samples or where the test is to be carried out frequently over extended periods of time. In the body of this test method, reference to zinc coating shall be interpreted to also include zinc alloy coating except where speci? Originally approved in Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
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.
NOTE 2—For convenience in calculating test results in inch-pound units, the specimen should have an area of 5. SR means the standard deviation for R reproducibility.
ASTM A90／A90M 13镀锌和镀锌合金钢铁制品镀层重量的试验方法_百度文库
The weight [mass] of coating in grams on a specimen of that area is numerically equal to the weight [mass] of coating in ounces per square foot of sheet. Under no circumstances should the water be added to the acid. Since the density of the steel is known 0. Historical Version s – view previous versions of standard. A number in parentheses indicates the year of last reapproval.
Ast 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. This standard has been approved for use by agencies of the Department of Defense. Specifications for zinc-coated articles frequently provide for different classes of coating so that the purchaser can asstm the coating weight [mass] most suitable to his needs.
The mixing should be performed under an astk fume hood. ASTM International takes astn position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Current edition approved April 1, Certain portions of the procedure involving determination of specimen weight [mass] have traditionally been performed in SI units, and corresponding inch-pound units are not included. Except as otherwise provided, the specimens should have a minimum area of 3 in.
ASTM A90/A90M – 13(2018)
If specimens were prepared to the dimensions as provided in Note 2, they shall be presumed to have an area of 5. Alternatively, for specimens of uniform thickness of base metal, such as a piece of plate or pipe, determine the average thickness of the stripped specimen to the nearest 0.
As the protection is provided by sacrificial loss of zinc, the degree of protection ast proportional a990 the weight [mass] of zinc coating.
In the body of this test method, reference to zinc coating shall be interpreted to also include zinc alloy coating except where specifically stated otherwise. No further reproductions authorized. The same solution may be used repeatedly until the time required for stripping becomes inconveniently long. Precision and Bias As the protection is provided by sacri? A coating of zinc on iron or steel articles provides protection against corrosion. Link to Active This link will always route to the current Active version of the standard.
Certain portions of a9 procedure involving determination of specimen weight [mass] have traditionally been performed in SI units, and corresponding inch-pound units are not included. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
For specific hazards statements see 5. For very small items, several pieces may have to be stripped to obtain the minimum area.
ASTM A90 – ZINC PLATING WEIGHT ON STEEL
Determine the weight [mass] of the specimens again, to the same precision as in the initial determination. When it is not possible to determine the area accurately, as in specimens from corrugated sheets, the thickness of the stripped sheet shall be determined to the nearest 0.
See Table 1 for a statistical summary of the test results.