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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Certain portions of the procedure a990 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. For very small items, several pieces may have to be stripped to obtain the minimum area.
Precision and Bias For specific hazards statements see 5. This standard has been approved for use by agencies of the Department of Defense.
Referenced Documents 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. Certain portions of the procedure involving determination of specimen weight [mass] have traditionally been z90 in SI units, and corresponding inch-pound units are not included.
Thank you for interesting in our services. As the protection is provided by sacrificial loss of zinc, the degree of protection is proportional to the weight [mass] of zinc coating.
We need your help! Determine the weight [mass] of the specimens again, to the same precision as in the initial determination. After stripping, wash the specimens by scrubbing them under running water, dip in hot water, and wipe or blow dry.
ASTM A90 – Free Download PDF
Unless otherwise indicated, it is intended that all w90 shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are available. Hydrochloric acid fumes are present, and hydrogen gas is evolved in the stripping process.
The specimen of wire may be of any length over 12 in.
For results to be reported in metric units, the specimen should have an area of mm2 of sheet Originally approved in 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.
The same solution may be used repeatedly until the time required for stripping becomes inconveniently long. If you feel that your comments asmt not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the wstm shown below. No further reproductions authorized. SR means the standard deviation for R reproducibility.
Permission rights to photocopy the standard may also be secured from the ASTM website www. 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. The mixing should be performed under an acid fume hood.
Historical Version s – view previous versions of standard. 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.
Size px x x x x A coating of zinc on iron or steel articles provides protection against corrosion. We need your help to maintenance this website.
This aatm is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Please help us to share our service with your friends. Your comments will zstm careful consideration at a meeting of the responsible technical committee, which you may attend.
A coating of zinc on iron or steel articles provides protection against corrosion. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
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
We are a non-profit group that run this website to share documents. If specimens were prepared to the dimensions as provided in Note 2, they shall be presumed to have an area of 5.
Please copy and paste this embed script to where you want to embed Embed Script. Link to Astn This link will always route to the current Active version of the standard. A number in parentheses indicates the year of last reapproval.