Menu
The Vampire Queen Diaries

ASTM D6677 PDF

Posted on April 26, 2020

Designation: D – 01Standard Test Method for Evaluating Adhesion by Knife1 This standard is issued under the fixed desig. From ASTM D Standard Test Method for Evaluating Adhesion by Knife. Section 3 | Summary of Test Method. Adhesion is determined by making an “ X”. Buy ASTM D Standard Test Method for Evaluating Adhesion by Knife from SAI Global.

Author: Kagor Tekus
Country: Gambia
Language: English (Spanish)
Genre: Sex
Published (Last): 9 November 2006
Pages: 484
PDF File Size: 8.72 Mb
ePub File Size: 5.29 Mb
ISBN: 291-6-69351-178-1
Downloads: 77881
Price: Free* [*Free Regsitration Required]
Uploader: Shaktigami

Irrespective of the application of the test, there are standard test methods procedures for conducting adhesion testing that should be followed to ensure consistency, especially when performing comparative analyses. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

ASTM D – 18 Standard Test Method for Evaluating Adhesion by Knife

Precautions are included regarding the use of the test on coatings with a high cohesive strength that may appear to have worse adhesion than one that is brittle and fractures easily. Generally, adhesion ratings of 8 and 10 are considered good, adhesion values of 4 and 6 are considered marginal, and adhesion values of 2 and 0 are considered poor.

Never the less, the adhesion is oftentimes considered to be acceptable under these conditions.

In order to be successful a coating system has to have both good tensile and shear adhesion. While tape and knife adhesion tests are generally regarded as more subjective than their tensile pull-off adhesion test counter parts, the tape and knife adhesion tests can be much more revealing d667 the true adhesion properties of a coating system. August 7, at 8: A f6677 in parentheses indicates the year of last reapproval.

  KERKYTHEA TUTORIALS PDF

It is correct this affirmation?

Standard Test Method for Evaluating Adhesion by Knife

The test has also been used successfully on softer substrates e. See DD and D A superscript epsilon indicates an xstm change since the last revision or reapproval. The shear tests are oftentimes more definitive because they better replicate the way in which coatings fail. We use cookies to understand how you use our site and to improve your experience.

Table 1 provides the evaluation criteria for Method A; Awtm 2 provides the evaluation criteria for Method B. This is primarily due to the directional forces applied to the coating system during the tests.

Coating Adhesion Testing using Knife/Tape Methods

Adhesion testing is also a valuable indicator for determining the integrity of coating systems that have been in service for extended periods of time, may require maintenance, and overcoating is a strategy being considered; and is frequently used during coating failure investigations.

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.

This test method has been vertex of the angle, attempt to lift up the coating from the found useful as a simple means of assessing the adhesion of substrate or from the coating below.

Tensile pull-off adhesion is the subject of an article by Melissa Swogger that is also available on the KTA University site.

Tape and knife adhesion exert a prying type of force. Compliance concerns here maybe need further investigation before final releases. In many instances a coating system can have excellent tensile adhesion but poor shear adhesion.

  ASSIMIL AMERICANO PDF

Test Specimen bility of regulatory limitations prior to use. Adhesion is evaluated qualitatively on a 0 to 10 scale. When appropriate, the nature and location of the separation is documented.

Further, the results of any knife adhesion tests performed on these coatings must be carefully considered. That is a correct statement. Adhesion tests that consistently reveal an adhesive break between coats or a cohesive break within a coat do not provide any information relative to the adhesion of the coating or coating system to the substrate.

Make each leg 1 of the angle a minimum of The tip of a knife blade is then inserted into the intersect of the two incisions and used to attempt to lift the coating from the substrate or an underlying coating.

The standard also contains a pictorial guide to aid in the rating of the cross-cut Method B. It is the to ensure straight cuts. The adhesion by knife test may provide a more accurate picture of the actual adhesion characteristics.

Adhesion testing may be a requirement of a coating specification, or may be used for coating system performance qualification in a laboratory. Undercutting and peeling can occur as a result of shear forces.

Tensile adhesion tests f6677 a force perpendicular to the coating system.

Related Articles

  • ASTM D2997 PDF
  • ASTM C1090 PDF
  • ASTM D5261 PDF
  • AMCA 803 PDF
  • ASTM D6217 PDF
  • ASTM D5045 PDF
  • ASTM D2170 PDF
  • ANSI-NETA MTS-2007 PDF
  • EN 9934-3 PDF
  • AMIDON TOROID CORE PDF
This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Cookie settingsACCEPT
Privacy & Cookies Policy

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.

Necessary Always Enabled

Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.