Corrosion analysis of_stainless_steel

Corrosion Analysis of Stainless steel

Introduction ,[object Object],[object Object],[object Object]

What is Stainless steel? ,[object Object],[object Object]

Types of stainless steel ,[object Object],[object Object],[object Object],[object Object],[object Object]

Austenitic Stainless Steel ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ferritic Stainless Steel ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Martensitic Stainless Steel ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Precipitation Hardening S.S ,[object Object],[object Object],[object Object],[object Object],[object Object]

Corrosion ,[object Object],[object Object]

Did you know? ,[object Object],[object Object]

Stainless Steel Corrosion ,[object Object],[object Object]

UNIVERSALITY OF CORROSION ,[object Object],[object Object]

WHY DO METAL CORRODE? ,[object Object],[object Object]

FORMS OF CORROSION AFFECTING STAINLESS STEEL ,[object Object],[object Object],[object Object]

WET & DRY CORROSION ,[object Object],[object Object]

WET /AQUEOUS CORROSION OF S.S ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

UNIFORM CORROSION OF STAINLESS STEEL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

GALVANIC CORROSION OF STAINLESS STEEL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Steel screw in Mg

Requirements For Galvanic Corrosion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

PITTING CORROSION OF STAINLESS STEEL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

INTERGRANULAR CORROSION OF STAINLESS STEEL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ERROSION CORROSION OF STAINLESS STEEL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

STRESS CORROSION CRACKING OF STAINLESS STEEL ,[object Object],Failure is along grain boundaries in a 316 stainless steel. .

PRINCIPAL ALLOYING ELEMENTS THAT AFFECT CORROSION RESISTANCE OF STAINLESS STEEL ,[object Object],[object Object],[object Object],[object Object]

Nickel(Ni) ,[object Object],[object Object]

Manganese(Mn) ,[object Object],[object Object],[object Object]

Molybdenum(Mo) ,[object Object],[object Object]

Corrosion Protection of S.S ,[object Object],[object Object],[object Object],[object Object]

Passivation of The Anode ,[object Object],Passive Film (Only microns thin, invisible and self repairing)

POLARIZATION ,[object Object],[object Object],[object Object],[object Object]

SACRIFICAL LAYER ,[object Object],[object Object],[object Object],Tiny cathode (steel) Large area anode (zinc)

ANOTHER EXAMPLE ,[object Object],Attachment points

Stainless Steel For Coastal And Salt Corrosion ,[object Object],[object Object]

Street Level Application There is no corrosion on type 316 bench and railing in downtown Chicago after 5 year of service. A smooth polished finished was used. These type 304 railing were corroded after one winter in Pittsburgh. They are uphill from a busy highway and salt laden road mist is blown on to them. The rough surface finish hold the salt the railing making corrosion worse.

Street Level Application Type 316 light poles were installed at Jones Beach, New York in 1967 with No.4 smooth finish. Although they are in parking area immediately adjoining to beach and exposed to coastal salt, there is no sign of corrosion Similar light poles of type 304, shown in right bottom was installed in a sheltered location few blocks from Miami Beach, Florida. After one year chloride corrosion is visible.

COST OF CORROSION ,[object Object],[object Object],[object Object]

CORROSION DAMAGE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Conclusion ,[object Object],[object Object]

Corrosion analysis of_stainless_steel

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