Neodymium magnet is an iron based permanent magnet, because of this, it is easy to be rusted or oxidation. To avoid such problems, the magnet coating, electrical plating or suitable surface treatment are needed. Please choose a kind of surface treatment from the following table:

Available Coatings for Magnets 

Surface Coating Thickness (Microns) Color Resistance 

Passivation   1 Silver Grey Temporary Protection 

Nickel Ni+Ni 10-20 Bright Silver Excellent Against Humidity 

Ni+Cu+Ni 

Zinc Zn 8-20 Bright Blue Good Against Salt Spray 

C-Zn Shinny Color Excellent Against Salt Spray 

Tin Ni+Cu+Sn 15-20 Silver Superior Against Humidity 

Silver Ni+Cu+Ag 10-20 Silver Superior Against Humidity 

Gold Ni+Cu+Au 10-20 Gold Superior Against Humidity 

Copper Ni+Cu 10-20 Gold Temporary Protection 

Epoxy Epoxy 15-25 Black,Red,Grey Excellent Against Humidity&Salt Spray 

Ni+Cu+Epoxy 

Zn+Epoxy 

Parylene Parylene 5-20 Grey Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved 

Chemical Ni 10-20 Silver Grey Excellent Against Humidity 

Magnetic door stopper 

With clamp magnets,used for all types of doors 

High quality,low price,fast delivery 

Easy to fix doors

Magnetic Door Catcher/Magnetic Door stopper

General Introduction

 1, Magnetic door stopper or door suctions, with clamp magnets, are used for all types of doors.

 2, Magnetic door catcher is easy to fix the doors.

 3, Magnetic door catchers are used to stop and avoid doors being shut suddenly with astonished noise by wind without any forenotice.

Customer's satisfaction is our companys' ever lasting goal. We hope our honest policy and quality goods will be your lasting choice. We promote our company with its brand-named products, along with the first-class service and top quality prdoucts. We sincerely looking forward to establishing long and mutual benefits business relation with new and old customers in the near future 

PCT:130c ,humidity 100%,vapor pressure 2.7 bar.20 days,average low weight loss less than 2 mg/cm2

Common Applications :

Sensors   Linear actuators   Microphone assemblies    Magnetic separators   DC and servo motors   Speakers   Printers   Magnetic hooksComputer rigid disc drives   Beam controls   Intelligent toys   MRI/NMR

We are specialized in producing NdFeB Magnet over many years,We guarantee the best price based on the same quality and service. Our finance conditiearon and industrial reputation are excellent.

Testing Center

We are ISO/TS16949:2002 certified and well implement all procedures strictly under control. Problem preventive actions and quality assurance are preoperly combined with special inspection for all procedures from raw material purchasing ,outside cooperating part manufacturing,inside manufacturing to shipping . We also install a complete set of physical and chemical test equipment to make sure that all our products are manufactured and shipped under strictly quality control .

Salt Spray Test :

Mainly test the surface treatment against the corrosion.  Usually the tested samples will be  continuous sprayed 24 hours in the 35℃ temperature to see if there is any rust appearance on the surface. 

Projection Instrument:

Mainly test the magnets with irregular shapes such as arc segments and any other irregular-shaped parts to see if their dimensions meet the customers' requirements or not.  

PCT Instrument:

Mainly test the magnets to prevent against corrosion on the high temperature and high atmospheric pressure . Usually the test condition is 120℃ temperature and 2 atmospheric pressure .

Heat& Humidity Instrument:

Mainly test the magnet to against corrosion on certain temperature and humidity . Usually the test condition is 80℃ temperature and 90%+/-3% humidity

Hysteresgraph:

Mainly test the magnetic characteristics of the magnet, including Residual (Br ), Coercive(Hcb) . Intrinsic  Coercive(Hcj), Max. Energy product(BH max) and any other related magnetic parameters. 

HSMAG Magnets has been supplying high quality Neodymium Magnets to customers for about 20 years.

Super Magnet

Made of neodymium, the most powerful magnet material in the world

Great for projects that require extreme strength in a small size

Permanent magnetism guaranteed

Not for children