How to check your mgo board,contains chloride or not?
There are 2 options:
1-Pour a cup of purified water,immerse some fine screw and mgo board sample.Check corrosion after 7 days.
2-Contact local testing lab,such as SGS. chloride content inspection,cost $300-400. It takes 7 working days
Source: https://www.rockmaxboard.com/faq/#collapse-1-236
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