ASTM D – 11 Standard Test Methods for Field Measurement of Surface Profile of Blast – Download as PDF File .pdf), Text File .txt) or read. 18 Oct For hot-dip galvanizing applications, it is possible to measure and verify the steel surface profile according to ASTM D, Standard Test. 1 Jan ASTM D Standard Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel.
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For more information related to surface preparation as it relates to hot-dip galvanized steel, you can contact AGA Corrosion Engineer Alana Hochstein at ahochstein galvanizeit. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The height asttm a f valley below a plane at the level of the highest surrounding peaks is measured with the fine pointed probe of Test Method B.
Therefore, differences are inevitable, particularly with deeper surface profiles, and the results may or may not fall within the specified range for one of the two methods. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM D – PDF Free Download
Measure the thickness of the tape compressed foam and non-compressible plastic film combined. To avoid these discrepancies, it is recommended that a single method be employed on a project.
According to ASTM D, a minimum of 10 readings is obtained per area; the maximum surface profile is reported discarding obvious outliers. NOTE 2—The test methods measure different values and the qualitative rating on which the applicability was determined also measures a different value.
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Adjust the instrument to zero. Each area is marked giving the nominal profile depth in mils or micrometres. Note 1 — Optical microscope methods serve as a referee method for surface profile measurement methods A and B.
NOTE 1—Optical microscope asym serve as a referee method for surface profile measurement. For hot-dip galvanizing applications, it is possible to asmt and verify the steel surface profile according to ASTM D, Standard Test 44417 for Field Measurement of Surface Profile of Blast Cleaned Steel, prior to application of repair materials where the surface has been prepared via power tool or abrasive blast cleaning methods.
Please copy and paste this embed script to where you want to embed Embed Script. For this reason, surface profile should be measured prior to coating application to ensure that it meets that specified. 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.
Models from a few gage manufacturers are available that conform to this standard. Significance and Use 3. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Recent changes to ASTM D provide updated test methods to reflect the latest advances in technology and newly accepted industry research.
The four standards are: This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. Only the use of surface profile depth micrometers and replica tape were updated, and the specification changes are sstm follows:.
The base of the instrument rests on the peaks of the surface profile while the cone-shaped point projects into the valley. This can be discussed and agreed upon at the pre-construction conference.
The comparator areas are used with or without magnification of 5 to 10 power. Permission rights to photocopy the standard may also be secured from the ASTM website www. The standard does not address discarding outliers, but an update to the standard addressing outlier readings is planned.
Differences in Surface Profile Measurements: ASTM D4417- Method B vs. Method C
Link to Active This link will always route to the current Active version of the standard. Thank you for interesting in our services. Replica Tape – Although the technology has remained mostly constant for replica tape since asttm introduction, industry research has addressed the sufficient number of readings required to achieve an accurate measurement.
When using magnification, the magnifier should be brought into intimate contact with the standard, and the depth of focus must be sufficient for the standard and surface to be in focus simultaneously. Leave this field empty. ASTM D contains three methods of measuring surface profile depth: Originally approved in Larger repair areas or prepared hot-dip galvanized surfaces for painting can be measured with two readings taken from a minimum of three, 6×6 inch 15×15 cm areas.
Size px x x x x Do not drag the instrument across the surface between readings, or the spring-loaded tip may become rounded leading to false readings. Today, Method B and Method C are the most commonly used, so that is what we will be x on.