bolting aluminum to mild steel
bolting aluminum to mild steel
(OP)
We are required to bolt a 1/2" aluminum flange to mild steel angle in an outside situtation in a mildly corrosive envirnment.
What would you recommend for gasketing:
- between the flanges
- under the bolt washers
- around the bolt shanks
The bolts are nominally loaded.
Thankyou
What would you recommend for gasketing:
- between the flanges
- under the bolt washers
- around the bolt shanks
The bolts are nominally loaded.
Thankyou





RE: bolting aluminum to mild steel
My suggestion would be to gasket the 2 flanges and use
stainless steel fasteners.Would it be practical to coat
the joint with marine grease or a suitable product?
Best of luck.
TWWeld.
RE: bolting aluminum to mild steel
Raul
RE: bolting aluminum to mild steel
SS316 and aluminium work very well together without galvanic corrosion.
I would use e.g. a NBR rubber gasket to part both flanges and use SS316 fasteners without any coating.
Best of luck
JLAU
RE: bolting aluminum to mild steel
RE: bolting aluminum to mild steel
You and JLAU are talking about two different applications.
In his case, I presume, relatively large aluminum parts are bolted with SS fasteners. Yours is an opposite case, SS parts are larger than aluminum parts. Aluminum is anodic and SS is cathodic. The larger the cathode, the more active galvanic reaction will become and, consequently, the corrosion process of the anode will go faster. In JLAU case, rusting of aluminum will be insignificant if any, because the S/steel fasteners (cathode) are much smaller.
Makes sense?
RE: bolting aluminum to mild steel
RE: bolting aluminum to mild steel
RE: bolting aluminum to mild steel
marine systems and know that aluminum will cause
electrolysis with ANY dissimilar metal.