WHAT IS HARD CHROME PLATING?

 Hard chrome plating is an electroplating process in which chromium is deposited from a chromic acid solution. Thickness of hard chrome plating ranges from 2 to 250µm. Various types of hard chrome include micro-cracked chromium, micro-porous chromium, porous chromium and crack free chromium. It is essential that the micro-cracked and porous coatings have a minimum thickness between 80-120µm in order to confer adequate corrosion resistance. Micro-cracked chromium has a Vickers hardness of 800-1000 kg/mm2, while crack-free chromium has Vickers hardness between 425-700 kg/mm2. The formation of micro-porous chromium is achieved by a specialised plating method involving the use of inert suspended particles. Porous chrome plating is developed by etching electrodeposited chromium. These are designed to retain lubricant, for sliding and bearing type applications.

Chrome plating is used for wear and corrosion resistance in addition to its tribological (low friction) characteristics. However, there are environmental concerns associated with disposal of the plating solution. This has led to many users of chrome plating seeking alternative coating methods. One option is to replace hard chrome with high velocity oxy-fuel (HVOF) sprayed coatings of cermet materials such as WC/Co (Tungsten Carbide/Cobalt). The HVOF sprayed coatings can offer superior wear and corrosion protection. A comparison of properties for HVOF sprayed WC-12Co versus hard chrome is shown in the table below.

hard chrome plating bar


Wuxi YUTONG As a professional chrome plated rod factory, there are various types of chrome rods/bars/shafts we have in stocks are standard hard chrome rods and induction hardened chromed rods . Other types of steel rods such as nickel-chrome rod and hollow chrome rods are also available on request.

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THE APPLICATION OF DIN2391 ST52.4 PRECISION HYDRAULIC STEEL TUBE

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  ST52.4 Hydraulic steel tubes   are tubes made in accordance to DIN 2391 / DIN 2445. ST52.4 is a high grade steel material, it can withstand higher working pressure with same tube OD size compare to ST37.4 material.  The delivery condition for grade ST52.4 tubes are in NBK finishing, which is normalized, phospated, and oiled inside and outside. Hydraulic tubes ST52.4 are measured by Outer Diameter (OD) and in varies tube thickness (THK). Difference of OD and tube thickness lead to different working pressure. ST52.4 Precision Hydraulic tube  is used in a variety of industries, including oil and gas, waterjet cutting, food processing, petrochemical/chemical, and many others for fluid handling.   Oil and gas:  The oil and gas industry has many uses for high pressure stainless steel tubing. In the field, high-pressure tubing is used for down-hole control systems, hydraulic and pneumatic piping, chemical injection modules, vacuum systems, and much more. Chemical/petrochemical:   High press
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The Application Of Chrome Plated OD Tubing

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  Chrome plated OD tubing   is also called chrome plated   hollow bar . Production with internal no honed and external chrome plated tubes, Chrome plated OD tubing usually made from grades ST52 and ST52.3 Drawn Over Mandrel (DOM) steel tubing and  seamless cold drawn tube . Chrome plated tubing is used in numerous types of industrial applications, including: Elevator Cylinder Telescope cylinders Scaling ladders Earthwork machines Agriculture machines And more Wuxi YUTONG  as a professional chrome plated tubing factory, there are various types of hydraulic chrome tube,  chrome plated rod , hollow chrome rods/bars/shafts we have in stocks are standard chrome plating and  induction hardened chrome plating  . Other types of steel rods such as nickel-chrome plated rod and hollow chrome plated bars are also available on request.
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