Corrosion Prevention with Patching

[JohnRwals]

Hi!
I wonder this patch method with cement grout can be used to prevent corrosion issue in the food processing facilities.
I saw this method in the precast concrete projects.
Is it acceptable detail to avoid corrosion-related problems with black finish plates and angles?

Thanks!

_JRW

 

[HTURKAK]

I would prefer at least MS plate with anti-rust paint . The weldments should also be painted after welding . The grout mix is a big question. Probably it would be better to use ready mix grout.

I have copied and pasted the relevant para. of the book ( FIB -CEB bulletin 43 Structural connections
for precast concrete buildings)

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4.2.6.2 Steel components
Steel parts like plates, bolts, slotted inserts etc have to be designed for the actual exposure class.
The steel elements should be adequately covered with concrete, or should be upgraded for corrosion
resistance by painting, electrolytic galvanizing, hot dip galvanizing, joint caulking, concrete grouting
etc. If not, non-corrosive materials should be used like stainless steel, acid resistant steel, etc. A
guideline is given in BLF (1997).
All-weather or other aggressive environment exposed connections should be periodically inspected
and maintained. If maintenance of the exposed steel is not possible, stainless steel is recommended.
Good experiences have also been reported with hot dip galvanising in combination with epoxy coal tar
paint.
The preferred method of protecting exposed steel connection elements is to cover them with
concrete, mortar or grout. Mix proportions, aggregate size and application procedures will vary with
the size, location and orientation of the element to be covered. Mixes containing chlorides should be
avoided.
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He is like a man building a house, who dug deep and laid the foundation on the rock. And when the flood arose, the stream beat vehemently against that house, and could not shake it, for it was founded on the rock..

Luke 6:48