化学镀镍工艺

Thisdescribes the plating of Nickel alloy deposits onto a suitable substrate using a chemical reduction process. These deposits may contain up to 13% Phosphorus by weight, or up to 5% by weight Boron. The electroless nickel plating process is sometimes simply called EN. Unlike electrolytically plated nickel coatings, they are produced without any externally applied electric current, onto catalytic metallic or catalyzed non-metallic substrates.

The coatings are applied to a wide variety of metallic and non-metallic substrates with both simple and complex geometries. Typical substrates include the electroless nickel plating of aluminum and steel. They are used to improve characteristics that are required for appearance, sophisticated engineering applications, magnetic plating and various harsh environments.

A large number of markets and industries benefit from our reliable, stable and environmentally advanced range of electroless nickel plating processes. These meet most global aerospace, automotive and military coating specifications.

AUTOMOTIVE

With the longer lives and greater reliability now required for automotive components, new applications are being developed, including the use of boron-nitride, a metal-ceramic composite coating that combines the strength and durability of electroless nickel coatings with the lubrication, and anti-frictional properties of hexagonal boron nitride (HBN)

用该涂层处理的组分包括汽缸衬里,差动销,排气管和歧管,锁件,用于盘式制动器/制动缸的焊盘支架,活塞杆,减震器,转向组件和同步齿轮齿轮。由于其对新的“生物”燃料的优异耐腐蚀性越来越地指定,在燃料应用中使用无电镀镍工艺也在增加。

ELECTRONICS

For electronic components the coating is used for its combination of corrosion resistance and solderability. Other important considerations are the non-magnetic or magnetic coating properties, the uniform thickness and its consistent electrical, thermal and physical properties. These benefits are applied to consumer electronics, aerospace and military coatings.

Coaxial connectors, headers, housings and cases, heat sinks, diode cans, shutters, interlocks and memory disks and drums are among the many components presently plated with electroless nickel coatings.

CHEMICAL & PETROLEUM

石油和化学过程行业是腐蚀保护的最大用户。高镍磷,25至75μm(1至3密耳)厚度通常用于抵抗侵蚀性盐水,酸和气体中的腐蚀和腐蚀。普通应用包括阀门,扼流圈,井喷防喷器,泥浆泵,吸盘杆和潜水泵,管道,换热器和分离器,封隔器,安全阀,生产管,以及所有类型的下孔工具。

FOOD

Food grade coatings must comply with all relevant regulation. The selection of the specific process depends on the usage and must be tested individually.

There is no general approval or recommendation of the electroless nickel plating process for food application. However due to its good corrosion and physical properties of electroless nickel plating of aluminum and steel substrates can be a good option for distinct applications.

MARINE

电镀铝用无电镀镍涂层是抵御苛刻的海上环境的绝佳选择。这种耐腐蚀性涂层还具有出色的耐磨性,因此延长了接受恒定处理和使用皮带轮和齿轮的部件的寿命。

MATERIAL HANDLING

For packaging machinery and food handling equipment, the electroless nickel plating process is used because it provides and excellent corrosion and wear resistant coating which also provides an attractive finish to help ensure the cleanliness of the part.

Electroless nickel is used to handle such diverse products as sodium hydroxide, food grade acids and fish oils. Its uniform deposit is especially useful for hydraulic cylinders, worm feeds and extruders, shafts, chain belts and other close fitting parts. Common food handling applications include pneumatic canning machinery, hamburger molds and grills, bun warmers, baking pans, fryers and chocolate molds.

矿业

Mining environments are both very corrosive and abrasive. Mine waters are typically acidic and can cause high rates of attack of unprotected steel. In addition, the dust produced during mining can result in severe erosion.

The electroless nickel plating process provides coatingss which withstand these conditions with little attack. Common applications are hydraulic components, framing, cylinder heads for jetting pumps, pipeline connections and tubing, and mine engine components.

MILITARY COATINGS

通常写入规格,MacDermid无电镀镀镍工艺为可靠的设备提供可靠的解188金宝搏官网版下载决方案。广泛用于电镀铝合金军用涂料应用包括各种要求;

  • Corrosion protection
  • Uniformity
  • Optical properties (i.e. low or high reflectivity)
  • 润滑性
  • 耐磨性

In most cases combinations are used to qualify electroless nickel coatings for military and defense.

MOLDS & DIES

The ability of electroless plating to provide a uniform deposit, even into deep recesses, helps to ensure that the finish on a mold will duplicate the original surface. The natural lubricity of the coating provides smooth flow during injection and quick and easy release of the part. Because of its high hardness at elevated temperatures, the electroless nickel coating minimizes erosion and abrasion of molds and dies and helps to extend their lives.

The coating also provides excellent protection against the corrosive fumes produced during molding such plastics as ABS, PVC, polycarbonate, acrylics and materials with thermoplastic additives. Similarly, electroless nickel plating has been found to provide a superior coating for zinc diecast dies and glass molds.

PRINTING & TEXTILE

The use of electroless nickel plating for cylinders and rolls used in the printing and textile industries has grown greatly during the past several years. The ability of the coating to deposit uniformly allows the cylinder to be machined to size, balanced and plated without subsequent finishing or grinding.

Typical plating thicknesses are 25 to 50 μm (1 to 2 mils). The life of this equipment is also greatly extended by this lubricious and wear resistant coating.

Other common textile applications include thread guides, fiber feeds, fabric knives, heddles, bobbins, shuttles, rapiers, ratchets, knitting needles and picks.

RAILROAD

铁路和化学镀镍histor很长y together.

For decades tanks containing corrosive media are plated with these corrosion resistant coatings. Another example are diesel engine shafts which benefit from the nickel coatings exceptional wear resistance and fretting characteristics.

In addition there are many more applications like unloading connections, trunions, bolts, etc.

WOOD & PAPER

Wood handling and pulp and paper equipment operate under conditions of severe corrosion and abrasion. The salt and organic acids present in woods can cause high rates of attack on common materials.

The electroless nickel plating process provides coatings with good protection against these conditions and are presently being used for knife holder cover plates and for abrading plates for wood cutting and chopping machines. Differential pins are also a large application area.

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