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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In the body of this test method, reference to zinc coating shall be ast to also include zinc alloy coating except where specifically stated otherwise.
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. A coating of zinc on iron or steel articles provides protection against corrosion.
For specific hazards statements see 5. Precision and Bias As the protection is provided atsm sacri? Therefore, the test should be performed under conditions of adequate ventilation.
Unless otherwise indicated, it is intended that all reagents shall conform to the speci? Mixing must be done by slowly adding sulfuric acid to water due to the heat generated and possible splashing. Permission rights to photocopy aa90 standard may also be secured from the ASTM website www. This requires aa90 15 to 30 s, except in the case of sherardized coatings, which require a somewhat longer time.
Coating weights [masses] on all zinc-coated articles other than sheets are expressed in weight [mass] per unit area of surface.
ASTM A90/A90M – 13(2018)
NOTE 2—For convenience in calculating test results in inch-pound units, the specimen should have an area of 5. Current edition approved April 1, For very small items, several pieces may have to be stripped to obtain the minimum area. Each of asttm laboratories tested three replicates of two different materials.
A coating of zinc on iron or steel articles provides protection against corrosion. If specimens were prepared to the dimensions as provided in Note 2, they shall be presumed to have an area of 5.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
See Table 1 for a statistical summary of the test results. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may awtm.
In the body of this test method, reference to zinc coating shall be interpreted to also include zinc alloy coating except where speci? No further reproductions authorized. 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.
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. SR means the standard deviation for R reproducibility. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
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. The mixing should be performed under an acid fume hood. For results to be reported in metric units, the specimen should have an area of mm2 of sheet After stripping, wash the specimens by scrubbing them under running water, dip in hot water, and wipe or blow dry.
The specimen of wire may be of any length over 12 in. 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. Hydrochloric acid fumes are present, and hydrogen gas is evolved in the stripping process.
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
Historical Version s – view previous versions of standard. 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. The same solution may be used repeatedly until the time required for stripping becomes inconveniently long.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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.
ASTM A90 – ZINC PLATING WEIGHT ON STEEL
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Link to Active This link will always route to the current Active version of the standard.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the satm of infringement of such rights, are entirely their own responsibility.