Designation: D – 93 (Reapproved ) Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation. Buy ASTM D() Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact) from SAI Global. Purchase your copy of ASTM D – 93() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards.
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A number in parentheses indicates the year of last reapproval. Lightly place the weight on the indenter and adjust the guide ashm so that the lifting pin is at the zero mark. Non-metal Materials Testing Instruments. A slot is cut lengthwise on one side of the tube to act as a guide for a cylindrical weight that?
After the coatings have cured, a standard weight is dropped a distance to strike an indenter that deforms the coating and the substrate. Universal Impact Testing — ASTM D Touchstone offers various kinds of impact testing including Charpy and Izod impact testing and micro-scale impact tests performed inside a scanning electron microscope. Foam And Gaskets Testing Equipments. Flexible Packaging Testing Equipments.
ASTM D2794 – 93(2010)
Originally approved in Opaque Glasses Testing Instruments. Film and Foil Testing Instruments. Impact Resistance Tester For Paint: Composite Films Testing Instruments.
Other gage steel panels may be used if agreed upon between the producer and the user. Electronics and Electrical Testing Equipments. Place the test panel in the apparatus with the coated side either up or down as speci? Raise the weight up the tube to a height where it is expected that no failure will occur.
The head rests on the test panel and the punch is held vertically by a guide ring. Wood and Laminates Testing Instruments. Tearing Resistance Testing Instruments. Once visible cracks are observed, repeat the test?
ASTM_D(Impact)_百度文库
NOTE 4—Because of axtm poor reproducibility of this method, the reporting of inch-pounds kilogram-metres in comparing coatings for impact resistance should be restricted to one laboratory. 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.
We also built a six-foot tall tester for custom testing. The value where the results change from mainly passing to mainly failing is the impact failure end point.
Test in a random fashion so that all impacts from one height are not made in succession or on one panel. The indentation can be either an intrusion or an extrusion. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Precision and Bias In its use over many years, this test method for impact resistance has been found to be useful in predicting the performance of organic coatings for their ability to resist cracking caused by impacts. By gradually f2794-93 the distance the weight drops, generally 1 inch 25 mm at a time, the point at which failure usually c2794-93 can be determined.
Release the weight so that it drops on the indenter. Summary of Test Method 4.
Water Vapor Permeability Testing Instruments. 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 organic coatings under test are applied to four or more suitable thin metal panels. Historical Version s – view previous versions of standard.
An impact test which is useful for testing paint and coating adhesion is ASTM D, the drop test performed on a universal impact tester see top photo.
Components Material Testing Equipments. Marble Floor Tiles Testing Instruments.
ASTM D() Standard Testing Instruments
Interlaboratory agreement is improved when ranking is used in place of numerical values. Conduct the test in the same environment or immediately on removal therefrom.
ASTM D provides a procedure for rapidly deforming by impact a coating film and its substrate and for evaluating the effect of such a deformation. Historical Version s – view previous versions of standard Translated Version s: Films generally fail by cracking see bottom photowhich is made more visible by the use of a magnifier, by the application of a copper sulfate CuSO4 solution on steel, by the use of a pin hole detector, or by a tape-pull test to determine the amount of coating removed.
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. Medical Product Testing Instruments. Impact Strength Testing Instruments. Ceramics and Glass Testing Equipments.