Designation: A90/A90M − 13Standard Test Method for Weight [Mass] of This test method covers procedures for determining the ASTM Standards 11 Oct Designation: A90/A90M − Standard Test Method for. Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings1. 1 May ASTM A90/A90M(). Standard Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings.

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The mixing should be performed under an acid fume hood. 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. Size px x x x x 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. Thank you for interesting in our services. We are a non-profit group that run this website to share documents. We need your help to maintenance this website.

Coating weights [masses] on all zinc-coated articles other than sheets are expressed in weight [mass] per unit area of surface. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely asmt own responsibility. The specimen of wire may be of any length over 12 in.

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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.


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. Specifications for zinc-coated articles frequently provide for different classes of coating so that the purchaser can select the coating weight [mass] most suitable to his needs. Please copy and paste this embed script to where you want to embed Embed Script.

A number in parentheses indicates the year of last reapproval. Significance and Use 3. 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. 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.

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. Except as otherwise provided, the specimens should have a minimum area of 3 in.

Hydrochloric acid fumes are present, and hydrogen gas is evolved in the stripping process. Historical Version s – view previous versions of 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 attend. For very small items, several pieces may have to be stripped to obtain the minimum area.

After stripping, wash the specimens by scrubbing them under running water, dip in hot water, and wipe or blow dry. Precision and Bias qstm This standard is subject to revision awtm any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Each of ten laboratories tested three replicates of two different materials. Originally approved in For results to be reported in metric units, the specimen should have an area of mm2 of sheet As the protection is provided by sacrificial loss of zinc, the degree of protection is proportional to the weight [mass] of zinc coating.


Since the density of the steel is known 0.

For specific hazards statements see 5. Where a continuous length is not available, shorter lengths totaling over 12 in. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are available.

Weights [masses] of coating on each side of the sheet are not In the body of this test method, reference to zinc coating shall be interpreted to also include zinc alloy asfm except where specifically stated otherwise. Please help us to share our service with your friends. Please fill this form, we will try to respond as soon as possible.

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

If specimens were prepared to the dimensions as provided in Note 2, they shall be presumed to have an area of 5. The same solution may be used repeatedly until the time required for stripping becomes inconveniently long. Permission rights to photocopy the standard may also be secured from the ASTM website www.

A coating of zinc on iron or steel articles provides protection against corrosion. Current edition approved April 1, Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

This standard has been approved for use by agencies of the Department of Defense.