Editing Passivation
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Certain prominent hardware vendors as well as popular blogs have been spreading this misinformation. We challenge those vendors to provide any scientific information to support the position that these acids enrich surface chromium to a similar extent as a citric acid treatment. | Certain prominent hardware vendors as well as popular blogs have been spreading this misinformation. We challenge those vendors to provide any scientific information to support the position that these acids enrich surface chromium to a similar extent as a citric acid treatment. | ||
Spike Brewing cites a study ([http://help.spikebrewing.com/helpdesk/attachments/35020109227 Wegrelius and Sjödén 2004]) to suggest that passivation isn't needed, | Spike Brewing cites a study ([http://help.spikebrewing.com/helpdesk/attachments/35020109227 Wegrelius and Sjödén 2004]) to suggest that passivation isn't needed, so we feel this deserves a more detailed analysis. | ||
*Introduction: The authors significantly overstate the hazards of citric acid. It is well known to be environmentally friendly and it doesn't create heavy metal waste. | *Introduction: The authors significantly overstate the hazards of citric acid. It is well known to be environmentally friendly and it doesn't create heavy metal waste. | ||
*Methods: The tested steel was grade 316L, which is not what comprises most home brewing gear. The molybdenum in a 316 alloy provides additional corrosion resistance compared to 304. The "L" signifies low carbon, which even further improved its natural corrosion resistance compared to 304. | *Methods: The tested steel was grade 316L, which is not what comprises most home brewing gear. The molybdenum in a 316 alloy provides additional corrosion resistance compared to 304. The "L" signifies low carbon, which even further improved its natural corrosion resistance compared to 304. |