ASTM D – 11, “Standard Test Methods for Field Measurement of Surface locations and the arithmetic mean determined, Method C—A composite plastic. ASTM D, Standard Test Methods for Measurement of Surface Profile of Blast Appendix C: Additional Considerations when Measuring Surface Profile. ASTM D – 11 Standard Test Methods for Field Measurement of Surface Profile of Blast Method C—A composite plastic tape is impressed into.
|Published (Last):||18 November 2006|
|PDF File Size:||6.79 Mb|
|ePub File Size:||16.14 Mb|
|Price:||Free* [*Free Regsitration Required]|
The standard describes the procedures for using and verifying the accuracy of portable stylus-type instruments to obtain surface characterization data, and provides guidance to the user regarding the significance of the data, once generated.
Specify the Test Instrument! Profile depth designations are based on the concept of mean maximum profile h max ; this value is determined by averaging a given number usually 20 of the highest peak to lowest valley measurements made in the field of view of a standard measuring microscope. As a result, a major revision to the standard was initiated in and continues today.
While both the depth micrometer and replica tape methods conform metuod ASTM D, the measurement astm d method c principles are quite different. Current edition approved May 10, For this reason, surface profile should be measured prior to coating application to ensure that it meets that specified.
Chloride contamination is the result of exposure to marine or coastal environments, chemical processes, or exposure to deicing materials i. The decision astm d method c to score has been left to the parties requiring the testing and those conducting it.
My presentations Profile Feedback Log out. Profile Method – Terms, Definitions and Surface Texture Parameters ISOPreparation of steel substrates before application of paints and related products – Surface roughness characteristics of blast-cleaned steel substrates Part 4: The distance between the highest peak and the lowest valley within any given evaluation length Rmax: Each area is marked giving the nominal pro?
Information relating to testing the tensile adhesion strength of coatings applied to surfaces other than steel will be removed from D during revisions that are also planned for NOTE 2—The test methods measure different values and the qualitative rating on which the applicability was determined asrm measures a different value.
With the base of the micrometer resting on the peaks of the surface profile, and the conical pin protruding to a valley of the profile, aastm distance is read from the gage display in mils or micrometers.
Members of Subcommittee D Recently published articles 1 describe the importance of other surface roughness attributes, in addition to average peak-to-valley distance, including peak count Dd4417 cmaximum roughness depth R max and maximum profile height R t.
The instruments described are readily portable and sufficiently sturdy astmm use in the field. There are additional techniques suitable for laboratory use not covered by these test methods. Historical Version s — view previous versions of standard.
ASTM D METHOD C DOWNLOAD
Typical comparator surfaces are prepared with steel shot, steel grit, or sand or other nonmetallic abrasive, since the appearance of the pro? Generally, if it was not addressed in the specification, then scoring was not to be done. So scoring is likely necessary on thick-film systems applied to concrete when trying to determine if the coating is firmly bonded to the substrate. Coarse replica tape is used to measure the actual roughness of surfaces containing a profile from 0.
Conceptually, the study will include two types of concrete normal and high strengthtwo coatings thick film with scoring and thin-film without scoringfive types of adhesion testers and up to seven laboratories. Hold the gage by its base and press?
William D. Corbett KTA-Tator, Inc.
As illustrated by this article, the dedicated leadership, committee member and interlaboratory study participation, and the knowledge and experience of those working in the task groups allows Subcommittee D DTest Method for Pull-off Strength of Coatings Using Portable Adhesion Testers, has been developed to uniformly methpd coating adhesion in the laboratory, shop, or field. Other trade organizations NACE International and the Society for Protective Coatings are jointly developing a guidance document on acceptable levels of soluble surface chloride, based on the coating type and prevailing service environment.
The data will reveal the variations asym testers and operators, and will be used to formulate new precision and bias statements. Three parts to this project 1. Pull-off strength tests may also be required as part of the execution of the project, and can be performed by inspection personnel.
Standards for Measurement of Surface Profile. Once the surface profile pattern has been replicated into the tape, it is removed from the surface and placed in a special spring tension anvil micrometer.
A burnishing tool is used to impress the foam face of the tape into the surface to create a reverse replica of the pro? The tape selected is based on the anticipated or v4417 surface profile depth. Adjust the instrument to zero.
The cleaning agents are used in a particular order of increasing aggressiveness to determine which one can remove the graffiti, with limits on level of gloss reduction and color difference to the affected coating. Precision and Bias 8. Portland cement concrete aastm a mixture of aggregate and cement paste. The greatest distance between the highest peak and lowest valley for any of the five sampling lengths that comprise an evaluation length Pc: The specified minimum pull-off strength must also be carefully considered.
Elimination of the automated washability tester method of graffiti removal. Currently, this subcommittee has eight task groups that are working on 13 ASTM standards, four of which are proposed standards and nine of which are existing standards that have been slated for revision or renewal, or that have been recently published and require the development of precision and bias statements through interlaboratory research methor.
During dd4417 blast cleaning, the mass of the abrasive and the velocity of the abrasive movement created by compressed air generates kinetic asym the abrasive can reach speeds of over miles per hour as it exits the blast nozzle. As a result, there are differences methox testing procedures that should be considered when evaluating coatings applied to concrete, versus coatings applied to steel.
Adtm are many revisions being considered by the subcommittee. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations d44417 to use.
Earl Bowry, Jotun Paints, Inc. The pull-off method is widely used by coatings manufacturers, specifiers, inspectors and coating specialists. The entire standard is being revised, and will include among other changes more specific operating procedures for the various types of test equipment. Steel is a fairly homogeneous substrate and its tensile strength does not vary from test site to test site. The surface profile must be compatible with the coating system.
Production Manager Ellett Industries September 14,