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.
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It is not intended for use with anodic sacrificial coatings such as asym and cadmium on steel. For example, if a panel rates as low as 4 for protection, it may be difficult to assess any additional appearance defects. The electronic file may not be reproduced in any way.
Similarly contact and ast, marks, mounting holes, and so forth, should be disregarded. Difficulties may be encountered in attempting to rate severely corroded panels. One point is assessed if the defects can be classi? Print 1 2 3 4 5 page sstarting from page current page.
One method of facilitating this comparison is to remove individual panels from their racks and place them beside other panels. It may be advisable to physically arrange all of the panels in order to merit.
Assignment of Protection Rating 6. 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.
Last previous edition approved in as B — 70 No items in cart. Therefore, the appearance rating cannot be assigned with the same degree of precision as can the protection rating. Such panels may arbitrarily be assigned one of two appearance ratings: Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Such procedure shall be con? It has been used also for rating similar panels that have been subjected to accelerated tests such as those covered by Practice B, Method B, Test Method B, ast, Test Method B There were no books found for the applied search filters.
Accordingly, this practice assigns separate ratings to 1 appearance astj affected by corrosion of the substrate and 2 appearance as affected by deterioration of the coating itself. Guidelines are given below, but judgment factors inevitably enter into the decision. Originally approved in Lighting during inspection b573 be as nearly uniform as possible; direct re?
ASTM B537 – 70(2013)
Typical decorative deposits exposed to marine atmospheres often tend to fail by crater rusting, whereas in industrial atmospheres, they are more likely aztm 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.
Accordingly, rating numbers shall be derived from the type of defect that exists, that is: 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.
Enter your account email address to request a password reset: The standards represent as nearly as possible the asfm amount of corrosion permissible for a given rating; there is a standard for each rating 1 asttm 9.
In that case, an inspection should be made and recorded before the panels are exposed. This method is used with standard-sized panels exposed on standard ASTM racks at outdoor test sites in both natural atmospheres and accelerated test conditions. Content only available by subscription.
ASTM B (Reapproved )e1_图文_百度文库
ASTM does not give asrm warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Since corrosion of the substrate also detracts from appearance, the appearance rating can be no higher than the protection rating.
Register for a trial account. This abstract is a brief summary of the referenced standard.
Inspection should be made in the as-is condition, and defects to be taken into account are only those that can be seen with the unaided eye at normal reading distance. Any modifications needed to adapt the method to rating actual production parts are not considered here. Original adjunct produced in 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.