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https://www.triangleoshkosh.com/resources/salt-spray-hour-data-sheet-on-electroplated-zinc/
Salt Spray Hour Data Sheet on Electroplated Zinc. This white paper outlines the ASTM requirements as stated in ASTM B633 for electrodeposited coatings of zinc on iron and steel. In accordance to this standard, there are six finish types and four thickness classes. each has their own corrosion requirement for minimum salt spray hours.
https://hoursfinder.com/a-hours/astm-b633-salt-spray-hours.html
Salt Spray Rating (hours) 8-10 microns 0.18+/-0.03 Black/Gold/Silver 240+ Pin Zinc Coating Zinc plate per ASTM B633-07, SC3 (Fe/Zn 12), Type II (Yellow) Thickness: 0.0007 +/-0.0002 Blind holes should be kept free of rust Port Tube Zinc Coating Zinc plate per ASTM-B 633.98, Class Fe/Zn 12, Clear Zinc Thickness: 0.0002 96hr salt
https://www.galvanizeit.com/uploads/ASTM-B-633-yr-13.pdf
approved in 1978. Last previous edition approved in 2011 as B633 – 11. DOI: 10.1520/B0633-13. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [email protected]. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.
https://www.columbiachemical.com/wp-content/uploads/Article-SaltSprayTesting-Corrosion-Protection.pdf
protection requirements were increased. The old ASTM-B633 standard of 72-96 hours to first white rust (FWR) quickly became obsolete by the new hex-free standards, such as GMW-3044, which required a mini-mum of 120 hours to FWR. In many cases, parts that were plated in optimal alkaline cyanide-free plating baths and then passivated in
https://elsmar.com/elsmarqualityforum/threads/salt-spray-failure-question-astm-b-633-and-b-117.56193/
Our supplier is not accepting our rejection based on the ideas that (1) handling the parts can negatively affect the SST (even though we wore gloves throught the whole process) (2) ASTM B 633 says that a salt spray test must be completed …
https://www.finishing.com/181/12.shtml
A. Type III refers to a clear (blue brite) chromate (passivate); Type II refers to a colored (yellow, olive drab)chromate. I believe it is ASTM B201-80 [affil. link to spec at Techstreet] that states you should get at least 24 hrs to white corrosion from a single dip clear (blue brite) chromate in a salt spray cabinet.. Yellow chromate should get 96 hrs to failure.
https://www.triangleoshkosh.com/media/wysiwyg/Salt_Spray_testing.pdf
We would like to show you a description here but the site won’t allow us.
https://www.finishing.com/375/83.shtml
We also have a standard calling for no white rust on the primary surface up to 12 hours. No more than 10% white rust on the primary surface for 96 hours. White rust on the edges is acceptable. I do agree that ASTM needs to help out with this situation by modifying B633 but …
https://sonicplatinginc.com/services/finishing-types-services/
Offering 96 hours of white salt spray corrosion resistance –Green, Olive Drab, Red, Purple, Dark Blue, Brown and Aqua Marine dyes available. Trivalent Chromium SPECIFICATIONS: B633-07. General Motors specifies (Hex-chrome free) per GMW3059 and GMW3044. Hexavalent chromium:-Clear/Blue chromate offers 12 hours salt spray corrosion resistance
https://www.technicalplating.com/zinc-plating
Our black zinc is able to exceed 168 hours of neutral salt spray to white corrosion without supplementary topcoats. Black zinc is typically specified due to it's appearance. Black zinc has real advantages over other dark finishes such as black oxide which provides minimum corrosion resistance while still imparting a dark beautiful sheen.
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