Ideal environments to prevent disk corrosion

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Disks need to run in environments meeting the following requirements:
1. The corrosion rate of the copper test wafer is lower than 300 ? 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.
If disks run in environments whose corrosion level is worse than G1, disks may corrode. Environment requirements for normal disk running have been described in the product documentation.

Other related questions:
Reasons of disk corrosion
Disks are integrated electronic mechanical devices. They have printed circuit boards (PCBs) which easily corrode in the corrosive environment. (Similar electronic devices have the same corrosion risk).

Simple methods to check whether the site is at risk of corrosion
1. Ensure the equipment room is not near any sulfurous gas emission sources. For example, porcelain factories, rubber plants, tire factories, chemical factories, sewage plants, power stations, paper mills, smelters, automobile factories, coal mines, electroplating factories, food factories, and tanneries Gas emissions may cause environmental corrosion 2. Ensure the equipment room is not near the sea, salt lakes, sewer outlets, sewage treatment tanks, and industrial/heating boilers. These factors may cause environmental corrosion. 3. Check whether the equipment room was decorated in the latest six months? The emissions released by certain chemical solvents may cause environmental corrosion 4. Check whether batteries are stocked in the equipment room, and if so, whether the batteries leak? If batteries leak, this may cause environmental corrosion. 5. Ensure that the equipment room is closed tightly, including the room windows and doors are always closed. If not, environmental corrosion risks may exist.

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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