Hôm nay tôi muốn nhắc lại những ưu điểm của việc làm sạch bằng laser.
Các phương pháp làm sạch kim loại chính hiện nay bao gồm phun cát, hóa chất tẩy rửa, và làm sạch bằng đá khô.
Phun cát là sự hướng các hạt vật liệu mài mòn rất mịn ở vận tốc cao vào các hạt vật liệu mài mòn trên bề mặt để làm sạch hoặc ăn mòn. Sandblasting is often used to prepare surfaces prior to painting. It is commonly used to strip paint from machinery and metal, but it has many other uses as well.
Disadvantages of blast cleaning ：1. Dust problem 2. Noise problem 3. Damage problem
Chemical cleaning refers to the method of using acid, alkali, organic chelating agent, dispersant and other chemical agents to dissolve and remove dirt and scale attached to the metal surface. There are pickling, alkali cleaning, ammonia cleaning, sludge stripping, solvent cleaning, Vân vân. It is suitable for equipment cleaning with high requirements on metal surface treatment.
Its main disadvantages are the pollution problem and the difficulty of operation.
Làm sạch bằng đá khô (dry ice blast cleaning), also known as cold spray, uses compressed air as the power and carrier, with dry ice particles as the accelerated particles, which are sprayed onto the surface of the object to be cleaned by a special jet cleaning machine, using high-speed solid dry ice Momentum change (Δmv), sublimation, melting and other energy conversions of particles make the dirt, oil and residual impurities on the surface of the object to be cleaned rapidly frozen, thus condensed, embrittled and peeled off, and at the same time removed with the airflow.
Disadvantage of dry ice blasting: 1. Supplies problem 2. Storage cost problem
The laser cleaning machine has none of the above disadvantages. It may have only one disadvantage. The initial investment is high, but the consumables of the laser cleaning machine in the later stage are only electricity.
