Bad batch of aluminum? What is this white stuff?

[Fordiesel69]

Brand new 2021 echo pb9010 blower. I was wondering what this white corrosion is all over the engine block?

Right out of the box it was like this I just never thought to post...

 

[Fordiesel69]

Another closeup

 

[Chris142]

Oxidation

 

[Cujet]

Normal aluminum oxidation. Remember, the more highly alloyed the aluminum, the faster it oxidizes. Clean it off with an oily rag if it bothers you.

 

[wpod]

Normal aluminum oxidation. Remember, the more highly alloyed the aluminum, the faster it oxidizes. Clean it off with an oily rag if it bothers you.

I knew an [email protected] would know. I had it explained to me when I was a teen by an [email protected]

 

[Dave9]

I was wondering what this white corrosion is all over the engine block?

My first guess would be a whitish colored corrosion.
Pretty common on aluminum castings that aren't painted...
... so... paint... or don't.

 

[DriveHard]

Just oxidation (rust if it were iron)...if I remember right from my material classes, Aluminum oxide is harder than the aluminum alloy and actually provides a protective coating...but that class was over 20 years ago ;-)

 

[wpod]

Just oxidation (rust if it were iron)...if I remember right from my material classes, Aluminum oxide is harder than the aluminum alloy and actually provides a protective coating...but that class was over 20 years ago ;-)

Yeah it seems like everything I am was 20 years ago !

 

[Fordiesel69]

So I honestly dont mind it being on there, if it wont hurt anything. It is not on any of my other echo peices I own, including an older 2019 model PB-8010 with very high hours. Was curious if it was some kind of contamination within the aluminum or something that got on it.

 

[chemman]

DriveHard is correct. The aluminum oxide layer is harder than the aluminum alloy used, and it stops further oxidation from occurring.