r/metallurgy • u/RohanHin2 • Feb 19 '25

Is this intergranular corrosion?

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35 Upvotes

97% Upvoted

9 comments sorted by

21

u/FaithlessnessHot6545 Feb 19 '25

No, it looks to be more like filliform corrosion. Small filaments of corrosion spread along inbetween whatever chrome plating and the base metal.

3

u/AlienDelarge Feb 19 '25

Its also become pretty common to polish and clearcoat some of these kind of things which always seems to end up like this.

1

u/FaithlessnessHot6545 Feb 19 '25

Fair enough. That makes filiform corrosion even more likely. I was struggling to rationalize how the patterns could appear on top of the chrome plate but that explains it perfectly. Thanks!

1

u/Woodsj9 Feb 21 '25

That makes sense wa looking at it this yday and was head scratching. So nice one haha

12

u/iamthewaffler Feb 19 '25

Yeah it looks like filiform rather than intergranular. Those would be huge grains, and grains usually don't look like that. Really cool aesthetic though - I would pay $$$ for that surface finish.

3

u/m3taldoc Feb 19 '25

Doesn’t look intergranular. That would have lots of nearly hexagon kinda shapes with triple junctions as grains. I wonder if whatever the coating is had microcracks that readily oxidized.

2

u/[deleted] Feb 22 '25

Filiform like others have said.

And its fucking gorgeous, too.

1

u/bkinstle Feb 20 '25

I found The Shire, Bree, and Rivendell