Gravity Castings Aluminum 7075 for Aerospace Pump Auto Motorcycle Cylinder HeadIN03090

 

Phosphorylation is a process of chemical and electrochemical reactions to form a phosphate chemical conversion film, which is called a phosphating film. The main purpose of phosphating is to provide protection for the base metal and to some extent prevent metal corrosion; Used for priming before painting to improve the adhesion and corrosion resistance of the paint film layer; Used for friction reduction and lubrication in metal cold working processes.

 

The mechanism of passivation can be explained by thin film theory, which suggests that passivation is due to the interaction between metal and oxidation properties, resulting in the formation of a very thin, dense, well covered, and firmly adsorbed passivation film on the metal surface. This layer of film exists as an independent phase, usually a compound of oxidized metals. It plays a role in completely separating the metal from the corrosive medium, preventing the metal from coming into contact with the corrosive medium, thereby basically stopping the dissolution of the metal and forming a passive state to achieve anti-corrosion effect.

Advantages of passivation

1. Compared with the traditional physical sealing method, the passivation treatment has the characteristic of absolutely not increasing the thickness of the workpiece and changing the color, improving the precision and added value of the product, making the operation more convenient;

2. Due to the non reactive nature of the passivation process, the passivation agent can be repeatedly added and used, resulting in a longer lifespan and more economical cost.

3. The passivation promotes the formation of oxygen molecular structure passivation film on the metal surface, which is dense, stable in performance, and has self repairing effect in the air. Therefore, compared with traditional methods of applying rust prevention oil, the passivation film formed by passivation is more stable and corrosion resistant.

 

Passivation refers to the phenomenon where the chemical stability of a metal or alloy is significantly enhanced by certain factors. The phenomenon of metal passivation caused by certain passivating agents (chemicals) is called chemical passivation. Oxidants such as concentrated HNO3, concentrated H2SO4, HCIO3, K2Cr2O7, KMnO4, etc. can all passivate metals. After metal passivation, its electrode potential moves in the positive direction, causing it to lose its original characteristics, such as the passivated iron cannot replace copper in copper salts. In addition, electrochemical methods can also be used to passivate metals, such as placing Fe in an H2SO4 solution as the anode, polarizing the anode with an applied current, and using a certain instrument to increase the iron potential to a certain extent, Fe is passivated. The phenomenon of metal passivation caused by anodic polarization is called anodic passivation or electrochemical passivation.

 

Spray coating: Using pressure or electrostatic force to attach paint or powder to the surface of the workpiece, providing anti-corrosion and decorative effects

Baking paint: Apply primer and topcoat on the substrate, and send each coat of paint to a dust-free constant temperature baking room for baking.

Infiltration: It is a microporous (fine seam) penetration sealing process. The sealing medium (usually a low viscosity liquid) is infiltrated into the micropores (fine seams) through natural infiltration (i.e. microporous self suction), vacuum extraction, and pressure, filling the gaps. Then, the sealing medium in the gaps is solidified through natural (room temperature), cooling, or heating methods to achieve the effect of sealing the gaps.

Oil spray: Spray paint onto the surface of the product and air dry it naturally.

 

Polishing is the process of modifying the surface of a workpiece using flexible polishing tools and abrasive particles or other polishing media. Polishing cannot improve the dimensional or geometric accuracy of the workpiece, but rather aims to obtain a smooth surface or mirror gloss, sometimes used to eliminate gloss (extinction). Usually, polishing wheels are used as polishing tools. The polishing wheel is generally made by stacking multiple layers of canvas, felt, or leather, with metal circular plates clamped on both sides. The rim of the wheel is coated with a polishing agent composed of a uniform mixture of micro abrasive and grease. During polishing, a high-speed rotating polishing wheel (with a circumferential speed of over 20 meters/second) presses against the workpiece, causing the abrasive to roll and perform micro cutting on the surface of the workpiece, thereby obtaining a bright machining surface. The surface roughness can generally reach Ra0.63~0.01 micrometers; When using a non greasy matte polishing agent, it can dull the bright surface to improve its appearance. When there is a slightly lower requirement for the surface of the product, drum polishing is often used. During rough polishing, a large amount of abrasive and product are placed in a can shaped drum. When the drum rotates, the product and abrasive are randomly rolled and collided within the drum to remove surface protrusions and reduce surface roughness.

 

Ultrasonic cleaning utilizes the cavitation, acceleration, and direct inflow effects of ultrasound in liquids to directly and indirectly disperse, emulsify, and peel off the dirt layer, achieving the cleaning purpose.

 

 

 

 

Basic Information

Total Capitalization	less than US$50,000
Country / Region	China
Year Established	2014
Total Employees	100 to 149
Business Type	Exporter, Manufacturer, Trading Company

 

Trading Capabilities

Total Annual Sales	less than US$50,000
Export Percentage	90 percent to 94 percent
OEM Services	Yes
Small Orders Accepted	Yes
Brand Names	Innolead
Payment Terms	TT
Main Competitive Advantages	Experienced R&D Department, Large Product Line, ODM (Original Designing & Manufacturing), OEM Capability, Production Capacity, Reliability, Reputation
Other Competitive Advantages	NA
Major Customer	Soprano, European Thermodynamics Ltd.
Export Markets	Australasia, Central/South America, Eastern Europe, Mid East/Africa, North America, Western Europe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTACT US

Alex He

Tel:+86 15989331617

Whatsapp&Wechat:+86 15989331617

Skype ID:alex.ho43

Email: alex.he@innolead.net

 

Web:www.innolead.net

 

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