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Recent content by Surin
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carbon steel outfitted with stainless steel bolts what will the react
If there is no insulator between the structure and the bolt, you have a classical case of galvanic corrosion. You have carbon steel as anode, stainless steel as cathode, you have electrical path between the two and you have atmosphere with moisture or your environment as electrolyte...- Surin
- Post #2
- Forum: Metal and Metallurgy engineering
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316 stainless steel versus sodium chloride traces
Corrosion in chloride environment for 316 SS is usually in the form of stress corrosion cracking (SCC). Important factors (besides residue stress) are chloride and dissolved oxygen. High temperature will accelerate the process by creating local concentratation of chloride at surface of the...- Surin
- Post #2
- Forum: Corrosion engineering
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304, 304L versus 316 in corrosion resistance against Nitric Acid
Nitric Acid is a specific environment for intergranular attack (IGA) on sensitized austenitic grades. As such the low carbon and stabilized grades are used i.e.,304L ( instead of 304), 321 and 347. A nitric acid grade (NAG) of very low carbon, silicon and phosphorus to improve resistance to IGA...- Surin
- Post #2
- Forum: Corrosion engineering
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Corrosion resistance of Brass
In general, the following materials, Al , cast iron, steel, brass and ferritic and martensitic stainless steel exhibit poor corrosion resistance in phosphoric acid.<br> <br> To be specific for 70-30 brass corrosion rate at 70 F 100% corrosive medium of phosphoric acid the corrosion rate is...- Surin
- Post #2
- Forum: Metal and Metallurgy engineering
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Corrosion prevention
Yes, Corrosion is measured (for uniform corrosion) as corrosion rate in the unit "mpy (mils per year)" and can be calculated using the following formula<br> <br> mpy = 534W/DAT where<br> W= weight loss, mg<br> D = density of specimen g/cm3<br> A= area of speciment sq.in<br> T = exposure time...- Surin
- Post #4
- Forum: Steel and Stainless engineering
