Reval Stainless Steel - Resistance to pitting corrosion in concrete structures

	Reval - resistance to pitting corrosion in concrete structures

	Stainless steel resistance to corrosion


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RESISTANT TO CORROSION | TO PITTING |

TO STRAY CURRENTS

REVAL® …RESISTANT TO PITTING

	Prof. Pedeferri writes ...

TRIGGERING OF CHLORIDE CORROSION \| CHLORIDES \| PENETRATION OF CHLORIDES

REVAL® = DURABILITY

The type of corrosive attack, due to the presence of chlorides, that a stainless steel sunk in concrete meets is called PITTING.

The resistance to pitting depends upon the composition of stainless steel; the higher the value of PRE (Pitting Equivalent Resistance) the more resistant is the steel to chloride attack.

PRE= %Cr + 3.3% Mo + (16÷30)%N

Chloride content (% by weight of cement)
		1.4462 316L 1.4362 1.4162 304Cu 304L 241MOD 12Cr9 Zinc-coated Epoxy-coated Carbon steel
	pH

Chloride content (% by weight of cement)
	pH	1.4462 316L 1.4362 1.4162 304Cu 304L 241MOD 12Cr9 Zinc-coated Epoxy-coated Carbon steel

Schematic representation of fields of applicability of steel bars in both alkaline (i.e. with pH around 13) and carbonated (i.e. with pH around 9) chloride contaminated concrete, at 20°C and 40°C.
The threshold levels are indicative only. They can decrease if the oxides produced by welding are not removed, or the potential due to anodic polarization increases (e.g. by stray current), or the concrete is heavily cracked.
Conversely, they can increase when there is a lack of oxygen or cathodic polarisation.

“REVAL® offer the best available solution against corrosion”

Reval - resistance to pitting corrosion in concrete structures

Stainless steel resistance to corrosion