Find the most up-to-date version of ASTM B at Engineering Purchase your copy of ASTM B – 70() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. ASTM B + REDLINE: STANDARD PRACTICE FOR RATING OF ELECTROPLATED PANELS SUBJECTED TO ATMOSPHERIC EXPOSURE – INCLUDES.
Peeling of the coating from the substrate, or of one coat from another, is the principal such defect. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Please login to your authorized staff account to use this feature. R is rounded off to the nearest whole number, leading to the tabulation given in Table 1. Typical decorative deposits exposed to marine atmospheres often tend to fail by crater rusting, whereas in industrial atmospheres, they are more likely to exhibit pinpoint rusting; and the latter atmosphere also tends to be more severe with regard to degradation of the coating system but somewhat less severe with regard to basis metal corrosion.
Such procedure shall be con?
It is based on experience in use of the asmt with standard by cm 4- by 6-in. This abstract is a brief summary of the referenced standard. The standards represent as nearly as possible the maximum amount of corrosion permissible for a given rating; there is a standard for each rating 1 through 9.
Accordingly, rating numbers shall be derived from the type of defect that exists, that is: Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Rating 10, accordingly, is arbitrarily assigned to a panel with no defects, and the equation operates at ratings 9 and below.
A number in parentheses indicates the year of last reapproval.
ASTM B537 – 70(2013)
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. For example, if a panel rates as low as 4 for protection, it may be difficult to assess any additional appearance defects.
Referenced Documents purchase separately The documents listed below are referenced asgm the subject standard but are not provided as part of the standard. Originally approved in It is not intended for use with anodic sacrificial coatings such as zinc and cadmium on steel.
One method of facilitating this comparison is to remove individual panels from their racks and place them beside other panels.
For example, it may be agreed that any panel with a protection rating of 5 is so unacceptable that an appearance rating has no meaning. For example, surface pits that begin to detract from re?
If dirt, salt deposits, and so forth, make it impractical to inspect them, panels may be sponged with a mild soap solution followed by water rinse; but no pressure should be exerted in this procedure such as would tend aetm upgrade the rating by, for example, cleaning off rust or rust stain. Current edition approved Oct.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Types of Defects 4. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Fractional ratings below 9, although normally not especially useful, may be assigned if desired. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Difficulties may be encountered in attempting to rate severely corroded panels. Assignment of Protection Rating 6.
This practice covers the recommended method for rating the condition of electroplated test panels subjected to corrosive environments for test purposes. There were no books found for bb537 applied search filters.
ASTM B (Reapproved )e1_图文_百度文库
A panel worse than the standard for rating 1 would rate 0. Corrosion pits probably not extending through to the basis metal—that is absence of obvious basis metal corrosion products bleeding therefrom. H537 your account email address to request a password reset: At the option of the inspector, this difficulty may be handled as follows:
Privacy & Cookies Policy
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.