Aloha, fun & authoritative answers -- no cost, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Metal finishing Q&As since 1989

-----

Compare corrosion resistance of "Zinc Plate" and "Yellow Zinc Plate"

As a supplier of industrial parts, corrosion resistance is often questioned relative to standard Zinc Plating vs. Yellow Zinc Plating as usually found on the Higher (grade 8) series of fasteners. Is one superior for exterior applications?

CJ Jons
Industrial products distributor - St. Paul, MN, USA
2007

What 'yellow zinc' means is simply that the chromate conversion coating on the zinc plating is yellow instead of clear. In the days before RoHS, yellow offered greater corrosion protection before white rust; but now color doesn't mean much. Zinc plating with yellow chromate or any other color really isn't thick enough to offer protection for long term exterior applications. For that you need galvanized fasteners.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2007

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: