Improvement Way

Surface profile

Surface profile is determined by a number of variables including the following: —

1. The strength and hardness surface cleaning
2. The speed of the abrasive
3. The hardness and specific gravity of the abrasive
4. The size or mass of the abrasive
5. The angle abrasive impact
6. The shape of the abrasive particles
7. The time the surface is exposed to jet

What that Hydro Blasting?

A cleaning technique that is based on the energy of water striking a surface to achieve its cleaning effect.
Two different operating pressures are commonly used:

1. Hydraulic pressure washing operation at higher pressures to 680 bar (10,000 psi)
2. Ultra high pressure water cleaning service pressures above 1700 bar (25,000 psi)

What is clean water?

1. Low water pressure wash operating at a lower pressure to 68 bar (1000 psi)
2. Wash water at high pressure operates at a pressure of 68-680 bar (1000-10,000 psi)
3. Added Pressure Hydro blasting at a pressure of 680-1700 bar
(10,000-25,000 psi)
4. Ultra high pressure water jet pressure works above 1700 bar (25,000 psi)
typically in the range 2000-2500 bar (30,000-36,000 psi)

Advantages of Hydro Dry Abrasive Blasting Blasting

1. Health and safety
Non abrasive used, the potential for reducing injuries
No respiratory problems for operators of powder
Low noise
No production sparks
It minimizes the interruption of other work around

2. Pollution
No pollution from dust in the paint Fresh, delicate pieces of machinery
No cleaning requirements

3. Reduction of surface salt
Reducing levels of salt surface

The contamination by the soluble salt

Salt contamination of steel and other substrates of ships' ballast tanks and Cargo is a common cause of coating failure, through blisters. There are two known mechanisms for the development of blisters, osmosis and corrosion.

If the surface is contaminated before painting with a hygroscopic material, for more than a critical amount, then the failure is probably osmotic blister occurring in the service. Hygroscopic materials such as salts of sea water tend to absorb water. That attract water through coating, where the volume of training its forces blister. This type of failure often occurs several weeks after immersion. The critical mass depends several factors, including coating characteristics and environmental factors. The more soluble salts greater the effect. Sodium chloride is more soluble than sodium sulfate and therefore more harmful pollutant.

Distribution of corrosion is a more gradual process usually takes several months to appear. The presence of salts of driving under the film leads to corrosion. The corrosion products generated in the cathode have a strong osmotic effect, resulting in blisters, while the anode produces large oxide also causes blisters.

The source of salts of pollutants in ballast and cargo tanks may be of previous cargoes, ballast water, the atmosphere, water washing and also the stream of abrasive used to prepare the steel. Many boat owners are specified contamination levels of salt in your siding and new construction contracts.

The author CC Ang who is the owner of http://engineeringsolutioncentre.com and has over 60 years of experience in corrosion control & protection, is important for all metal structures. He has given consultations to countless organizations in the industry. To know more about this industry you can visit his blog http://engineeringsolutioncentre.com

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