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  • Q What is mgo board?


    Magnesium oxide board or "mgo board" in short,It is fireproof,waterproof,light weight,high strength,moldew and termite proof
    wall panel,thickness range from 4mm-30mm,It consist of 3 element,(magnesium oxide),(salt) and (water)


  • Q How many kinds of mgo board?


    MgO boards predominately come in three different types: 

    magnesium oxychloride hydrate

    magnesium oxysulfate hydrate

    magnesium oxyphosphate hydrate

    They are fomulated with different kind of salt.

    Most of mgo board export from China is magnesium oxychloride hydrate type

  • Q Most of mgo board come from China,Why?


    Magnesium oxide resist 1400'c fire and low heat transfer,it is one of the best fireproof material in the world.

    Most of magnesium oxide mine located in Changbai Mountain,north part of China.

    Chinese has rich experience of manufacturing and using magnesium concrete over hundred years

  • Q Mgo board(magnesium oxychloride hydrate) corrode steel,Why?

    A Metallic corrosion is the process of either stealing or donating electrons, when the electrons are stolen or donated, the metal atoms will dissolve in the water. Salt water is a the main conductor, so the rate of corrosion increases dramatically. When mgo board in high humidty enviroment(80%),inside chloride iron will dissolve and move toward water,when it contact with metal,unavoidale corrosion will happen on its surface
  • Q What would be happen if you use magnesium chloride board with steel frame or galvanized frame?


    4 disavantages

    1-screws and frame affect by chloride ions and get rust when moisture is high

    2-panel damp and cry in rainy days,wet and dray cause plaster crack

    3-panel get powery on the surface after frequent wet and dry

    4-panel has risk of cracking at the joint after few months

  • Q How to check your mgo board,contains chloride or not?


    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

  • Q How to provent magnesium chloride board corrode steel?


    4 options

    1-Use stainess screw and stainless frame or aluminmium frame. 

    2-Replace steel frame by wood frame and stainless screw

    3-Laminate a plastic film on reverse that next to the steel frame

    4-Dismantle magnesium chlrodie board,use chloride free mgo board instead

  • Q Is there new regulation for sale and use chloride mgo board?

    Chinese magnesium oxide board industry association issued new industry standard for export mgo board,on June 11th,2018
    all the export chloride mgo board require to state limitation in export document and specification. 
    1,Chloride mgo board is limited to indoor and other non humid condition, unless make appropriate waterproof treatment.
    2,Chloride mgo board shall not be directly contacted with metal parts without rust treatment
  • Q What is ROCKMAX MGO?


    1,ROCKMAX is new generation chloride free mgo board, do not have corrosion problem.

    2,ROCKMAX is approved panel,test in full

    3,ROCKMAX's material safety meet European "REACH",exclude 191 kinds of harmful material may effect health.

    4,ROCKMAX provide guarrantee for steel frame system safty,compensate 200% on CNF price ,when chloride>0.5%.

About  RockMax™

Kunshan Boda Building Material Co., a new company established in 2010, which is professional producer of magnesium cement boards, our...
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