For hot-dip galvanizing applications, it is possible to measure and verify the steel surface profile according to ASTM D, Standard Test. ASTM D – 11 Standard Test Methods for Field Measurement of Surface Profile of Blast – Download as PDF File .pdf), Text File .txt) or read. ASME B, Surface Texture (Surface Roughness, Waviness and Lay); ASTM D, Standard Test Methods for Measurement of Surface Profile of Blast.
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Leave this field empty. For measurements that fall between tape sizes, it is still required that two readings using each tape are to be averaged to comprise one reading i.
October 18, Authored by Alana Hochstein. For more d44177 related to surface preparation as it relates to hot-dip galvanized steel, you can contact AGA Corrosion Engineer Alana Hochstein at ahochstein galvanizeit. 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 their own responsibility. Your comments will receive careful consideration at a meeting of the responsible technical committee,1which you may attend Copyright?
According to ASTM D, a minimum of 10 readings is obtained per area; ast, maximum surface profile is reported sstm obvious outliers. To avoid these discrepancies, it is recommended that a single method be employed on a project. Subtract the thickness of the noncompressible plastic? The four standards are: So, in effect the reading on the micrometer or the RTR from the replica tape represents several peaks and valleys, while the depth micrometer does not.
Current edition approved Ashm 10, Measure the thickness of the tape compressed foam and non-compressible plastic? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
A number in parentheses indicates the year of last reapproval. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. 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. The measurements must conform to the minimum and maximum surface profile requirements listed in the project specification.
Once the burnishing process is complete, the replica tape is removed from the surface and the image is measured using a spring-loaded micrometer. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
There are currently four primary standards for measurement of surface profile in steel surfaces. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Differences in Surface Profile Measurements: ASTM D4417- Method B vs. Method C
A burnishing tool is used to impress the foam face of the tape into the surface to create a reverse replica of the pro? Instead, recording of the highest reading when using a depth micrometer most closely matches the same measurements produced using replica tape. The base of the instrument rests on the tops of the peaks of the surface pro?
As a result, only two readings per area are satm required to be averaged to obtain one measurement, instead of the three readings previously required. Hold the gage by its dd4417 and press? There are additional techniques suitable for laboratory use not covered by these test methods.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. Standards for Measurement of Surface Profile. Typical comparator surfaces are prepared with steel shot, steel grit, or sand or other nonmetallic abrasive, since the appearance of the pro? How is Surface Profile Depth Quantified?
Adjust the instrument to zero. According to ASTM D, a minimum of 2 asmt is obtained per area; the average of the two readings is reported. Last previous edition approved in as D — 93 The instruments described are readily portable and sufficiently sturdy for use in the? ASTM D contains three methods of measuring surface profile depth: Authored by Alana Hochstein.
Updates to ASTM D | American Galvanizer’s Association
The creation of this peak-valley pattern in the surface effectively increases the surface area, providing an anchor for the coating system. These changes reflect industry research on current tooling which revealed averaged measurements are consistently less than the values obtained using replica tape. Standards for Measurement of Surface Profile There are currently four primary standards for measurement of surface profile in steel surfaces.
Because the results for the microscope and for the? Each area is marked giving the nominal pro?