GSI

PRINCIPLE OF RUST PREVENTION

Definition of the corrostion
The metal crrosion is the process that the metal back to the stable oxidation compound state in the nature. In the process of chemical reaction , the corrosion become the synthsis of inorganic compound. Not only the corrosion is the result of combination of metal and oxygen in the air simply,but the trace water or other substances on the metal surface play the role of electrolyte.The metal ion and the hydration ion inside is moved by the electrons flow,which lead to the process of the oxidation-reduction reaction.Therefore,overmuch water contents and other substances on the metal surface is the main cause of corrosion. The surface of the welding position or processing, are also the main reason for the corrosion. 
The rusting of iron
 
Principle of rust prevention    
The VCI is the English Volatile ,Corrosion,and Inhabitor. It is a kind of corrosion inhibitor which is synthesized by special ingredients.                                                                 
VCI contained in the gasification anti rust product begins to sublimate and volatilize the antirust gas particles which diffuse and penetrate into the surfaces of the articles for antirust and adhere on them to form a compact protection film with the thickness of monomolecular to avoid the surfaces of the articles for antirust in contact with all factors inducing corrosion, thus the corrosion is effectively prevented.
The advantage of VCI 
1.It does not need to daub with antirust oils, the working environment clean,and there is no need to brush and degreasing process. The rust proof packaging can be completed at one time, shorten the time of packing, and reduced the cost
2The VCI particles can enter into the tiny space in the packaging,compared with other antirust method, it can achieve a better effect for antirust , if there is a water residue in the interior, the VCI particles can also dissolve in water and obtain sufficient antirust effect                                                                                                            
3.The antirust period is up to 2 years ,safe and clean,environment friendly.                                                                                                                   
4. Even if in the wet and polluted environment, it can achieve the best anti rust effect.                                                                                                                       
5.It will not damage the metal product .                                                                                                                 
6.It contains no Silicones,Phosphate and heavy metals,being safe to human body and environment.
VCI product compared with other untirust products
Anti rust liquid
Anti rust oil More common used 
More affordable price Additional processing procedures are required to be added and cleaned.
Effect on rubber, polyethylene products
Heavily polluted environment
Need to increase treatment equipment (soaking, spraying, etc.)
Temperature, climate, external conditions will greatly affect the effect of unti rust
Vacuum packaging Excellent anti rust effect
will not damage all kinds of rubber and plastc parts. Need to be equipped with expensive packaging equipment
Easy to be damaged in transportation.
It can not be packed to the large volume product.
Packing cost is too high.
A higher packaging technology is required.
VCI packaging Can protect the places which the anti rust oil and other oil can not protect.
Easy to pack,starage ,and transport.
Treatment is simple, do not need to soak and clean treatment, save costs
Prevent it from being contaminated
Reusable Choose the right VCI products according to the specific metal materials.
Need the packaging sealed.

VCI product compared with other untirust products


方法

优点

缺点

Anti rust liquid
Anti rust oil

More common used
More affordable price

Additional processing procedures are required to be added and cleaned.
Effect on rubber, polyethylene products
Heavily polluted environment
Need to increase treatment equipment (soaking, spraying, etc.)
Temperature, climate, external conditions will greatly affect the effect of unti rust

Vacuum packaging

Excellent anti rust effect
will not damage all kinds of rubber and plastc parts.

Need to be equipped with expensive packaging equipment
Easy to be damaged in transportation.
It can not be packed to the large volume product.
Packing cost is too high.
A higher packaging technology is required.

VCI packaging

Can protect the places which the anti rust oil and other oil can not protect.
Easy to pack,starage ,and transport.
Treatment is simple, do not need to soak and clean treatment, save costs
Prevent it from being contaminated
Reusable

Choose the right VCI products according to the specific metal materials.
Need the packaging sealed.