Home > Media & Resource > Blog

Custom crane primer painting and finish coating

05 Jun, 2017

overhead crane and gantry crane need crane primer painting, Intermediate coating, and Finish coating to prevent corrosion and ensure the working life. Dongqi offers custom crane coating paint. Yellow, Red, and Blue, etc. Check now. gh0Henan Dongqi Machinery Co., Ltd

Custom crane primer painting and finish coating

Based on the electrochemical principle of steel corrosion, to coat the corrosion prevention layer to the steel surface is the most commonly used method. Commonly, there are three types of corrosion prevention layers:gh0Henan Dongqi Machinery Co., Ltd

  • Metal crane coating: A layer of metal is coated on the steel surface by electroplating, plating, electroless plating, hot dip, etc.gh0Henan Dongqi Machinery Co., Ltd

  • Chemical protective layer: A layer of anti-corrosion chemical compound film is coated on the surface of the steel by chemical or electrochemical methods.gh0Henan Dongqi Machinery Co., Ltd

  • Non-metallic protective layer: A layer of crane coating is coated on the surface of the steel by shelling-out and spraying to protect the steel, which is the most frequently used method.gh0Henan Dongqi Machinery Co., Ltd

Overhead crane primer coating, Inermediate coating, and final coating

Overhead crane primer coating, Inermediate coating, and final coatinggh0Henan Dongqi Machinery Co., Ltd

Anticorrosive crane coating

Anticorrosive crane coating is the most commonly used method to protect the steel surface at present. The anticorrosive crane coating can be classified into three layers, the primer coat, intermediate coat, and finishing coat, each of which has its own specific features and functions. The three layers together form a composite crane coating to protect the steel from the corrosion, and prolong the working life.gh0Henan Dongqi Machinery Co., Ltd

  • Primer coat: Primer coat is commonly coated by the paint which is zinc rich primer and epoxy iron red primer.gh0Henan Dongqi Machinery Co., Ltd

  • Intermediate coat: Intermediate coat is painted by epoxy micaceous iron oxide and glass flake epoxy paint.gh0Henan Dongqi Machinery Co., Ltd

  • Finishing coat: Finishing coat mainly uses the epoxy paint and chlorinated rubber coat and polyurethane coat.gh0Henan Dongqi Machinery Co., Ltd

Overhead crane coating

Anticorrosive crane coating selection

Confronted with various types of crane coatings and painting, how to make the right choice? The following tips are for your reference:gh0Henan Dongqi Machinery Co., Ltd

  • The local climate and environment of the application.gh0Henan Dongqi Machinery Co., Ltd

  • The ease of the construction conditions.gh0Henan Dongqi Machinery Co., Ltd

  • The correction usage of the layers of anticorrosive crane coatings.gh0Henan Dongqi Machinery Co., Ltd

  • The economy, durability and toxicity of the painting, etc.gh0Henan Dongqi Machinery Co., Ltd

Overhead crane with bluce painting

Thickness of the crane coating

On selecting the right crane coating, the thickness of the crane coating also matters.If the crane coating is too thin or uneven, the crane coating will have pinhole, from which the steel will get corrosion, and become into rusty bulge which will expand gradually, and finally the crane coating will drop off. If the crane coating is too thick, it may enhance the protection but also will reduce adhesion and mechanical properties, and increase the costs.gh0Henan Dongqi Machinery Co., Ltd

General requirements of the crane coating thickness

  • For the components which has common requirements to the crane coating, it usually needs two primer and two fish coat when manual and powered dedusting is used.gh0Henan Dongqi Machinery Co., Ltd

  • For the components which has higher crane coating requirements, it would be better that the primer should be painted two times, the intermediate lacquer 1 to 2 times, and the finish coat 2 time when a jet blasting is used.gh0Henan Dongqi Machinery Co., Ltd

  • The total dry film crane coating thickness is not less than 120μm (weak erosion) and 150μm (moderate erosion), 200μm (an important component of a strong erosion). The thickness of the film should be even, continues, no pinhole in order to achieve the good anti-corrosion effect.gh0Henan Dongqi Machinery Co., Ltd

DQCRANE PRODUCTS