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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The specimen of wire may be of any length over 12 in. Except as otherwise provided, the specimens should have a minimum area of 3 in. 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. Current edition approved April 1, Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Precision and Bias 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.
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. 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.
ASTM A90 – ZINC PLATING WEIGHT ON STEEL
The same solution may be used repeatedly until the time required for stripping becomes inconveniently long. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? If specimens were prepared to the dimensions as provided in Note 2, they shall be presumed to have an area of 5. In the body of this test method, reference to zinc coating shall be interpreted to also include zinc alloy coating except where speci?
Mixing a990 be done by slowly adding sulfuric acid to water due to the heat generated and possible splashing. Coating weights [masses] on all zinc-coated articles other than sheets are expressed in weight [mass] per unit area of surface.
Link to Active This link will always route to the current Active version of the standard. As the protection is provided by sacri?
A coating of zinc on iron or steel articles provides protection against corrosion. 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.
Historical Version s – view previous versions of standard. 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. For specific hazards statements see 5. After determining the weight [mass], immerse each specimen singly in the stripping solution and allow to remain until the violent evolution of hydrogen has ceased, and only a few bubbles are being evolved.
For results to be reported in metric units, the specimen should have an area of mm2 of sheet Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Originally approved in SR means the standard deviation for R reproducibility. After stripping, wash the specimens by scrubbing them under running water, dip in hot water, and wipe or blow dry. Therefore, the test should be performed under conditions of adequate ventilation.
See Table 1 for a statistical summary of the test results. Referenced A0 purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. NOTE 2—For convenience in calculating test results in inch-pound units, the specimen should have an area of 5. Since the density of the steel is known 0.
Where a continuous length is not available, shorter lengths totaling over 12 in. Each of ten laboratories tested three replicates of two different materials. Unless otherwise indicated, it is intended that all reagents shall conform to the speci? Permission rights to photocopy the standard may also xstm secured from the ASTM website www.
For very small items, several pieces may have to be stripped a0 obtain the minimum area. Hydrochloric acid fumes are present, and hydrogen gas is evolved in the stripping process. 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.
ASTM A90/A90M – 13(2018)
A coating of zinc on iron or steel articles provides protection against corrosion. The mixing should be performed under an acid fume hood. A number in parentheses indicates the year of last reapproval.
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. This standard has been approved for use by agencies of the Department of Defense.