Analysis of the system environment
Check the environment for the corrosive gas
Eco checker is the environment test kit that contains 5 metal pieces in small case. If the test kit is exposed to the environment that contains corrosive gas, the metal color changes. From the status of the change in color in the metals, we can predict the type of the gas and the content roughly.
Example
Failure phenomenon: After 1 year of the system installation, the system has the function problem due to the corrosion.
Analysis
1. Place several eco checkers in the different area within the partition in the office room.
2. Collect the eco checkers after 30 days, and analyze by means of Fluorescent X-ray method.
=> Clarify the type of the corrosive gas and its containt in the within the partition.
=> The waste water tank in the located beyond the partition is proved to be the source of the corrosive gas; Hydrogen sulfide.
Room layout
Cu and Ag are remarkably corroded.
=> Detect Hydrogen sulfide gas, in high density
Effect verification of the corrective action
1. Establish the sealed room for the system. Install the ventilator to remove the corrosive gas.
2. Place the eco checkers in the several places in teh room.
3. Collect the eco checker after 30 days, and investigate by means of fluorescent X-ray method.
=> The content of the corrosive gas has been reduced due to the corrective action.
Location of the eco checker (Blue)Corrective action- Establish the sealed room for the system/ waste water tank. - Install the ventilator to remove the corrosive gas.
less corrosion in Ag
=> Hydrogen sulfur has been reduced
Investigate the effect of the dust on the system
Dust can contain the corrosive elements, therefore cause the failure in system due to the corrosion.
Analyze the dust for the corrosive elements by means of EPMA.
Example: Dust on the system installed in the office near the sea coast.
Detect co-existence of the Na and CL, which can be considered as NaCl (grain of the sea salt). The risk of the corrosion /adverse effect of the salt is anticipated due to the grain of the sea salt.