What's the concentration level of corrosive airborne contaminants in a data center

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The concentration level of corrosive airborne contaminants in a data center shall meet the requirements listed in the white paper entitled Gaseous and Particulate Contamination Guidelines for Data Centers published in 2011 by American Society of Heating Refrigerating and Air-conditioning Engineers (ASHRAE) Technical Committee (TC) 9.9.

According to the Guidelines, corrosive airborne contaminants in a data center shall meet the following requirements:
Copper corrosion rate
Less than 300 ?/month per ANSI/ISA-71.04-2013 severity level G1.

Silver corrosion rate
Less than 200 ?/month.

Other related questions:
What are Common corrosive airborne contaminants and their sources for the Proper Running of the server
H2S Geothermal emissions, microbiological activities, fossil fuel processing, wood rot, sewage treatment SO2, SO3 Coal combustion, petroleum products, automobile emissions, ore smelting, sulfuric acid manufacture S Foundries, sulfur manufacture, volcanoes HF Fertilizer manufacture, aluminum manufacture, ceramics manufacture, steel manufacture, electronics device manufacture NOX Automobile emissions, fossil fuel combustion, chemical industry NH3 Microbiological activities, sewage, fertilizer manufacture, geothermal emissions, refrigeration equipment C Incomplete combustion (aerosol constituent), foundry CO Combustion, automobile emissions, microbiological activities, tree rot Cl2, ClO2 Chlorine manufacture, aluminum manufacture, zinc manufacture, refuse decomposition HCl Automobile emissions, combustion, forest fire, oceanic processes, polymer combustion HBr, HI Automobile emissions O3 Atmospheric photochemical processes mainly involving nitrogen oxides and oxygenated hydrocarbons CNHN Automobile emissions, animal waste, sewage, tree rot

What are the gaseous corrosivity levels
According to ANSI/ISA-71.04-2013 Environmental Conditions for Process Measurement and Control Systems: Airborne Contaminants, the gaseous corrosivity levels are G1 (mild), G2 (moderate), G3 (harsh), and GX (severe)

Environmental corrosion level requirements of storage products
1. The corrosion rate of the copper test wafer is lower than 300 ?b per month in compliance with ANSIc/ISAd-71.04 environmental corrosion G1 level. 2. The corrosion rate of the silver test wafer is lower than 200 ? per month in compliance with ANSIc/ISAd-71.04 environmental corrosion G1 level. You are advised to ask a professional organization to monitor environmental corrosion levels in the equipment room.

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