KR20030030233A - Method of surface painting of streetlight pole made of castiron - Google Patents

Abstract

PURPOSE: A surface painting method of a cast iron lamppost is provided which does not generate the rust on the surface of the cast iron lamppost. CONSTITUTION: The surface painting method of a cast iron lamppost includes processing the street lamp material supplied from a foundry site mechanically, loading in a heating furnace before painting, warming to at least 150 deg.C for 1 to 2 hours to evaporate the moisture and oxygen latent in the pore on the surface of the casting, thereby keeping the vacuum state, and applying an adhesive rust resisting paint to seal the pore completely, thereby preventing the moisture and oxygen from infiltrating from the outdoors.

Description

Method of surface painting of streetlight pole made of castiron}

The present invention relates to a method of surface coating so that corrosion does not occur on the surface of the cast iron street lamp.

The original functions of cast iron street lamps are produced for the purpose of urban aesthetics, landscape culture, pleasant environment, antique taste, etc., but the surface coating method is poor, and the original functions are not available.

The present invention is to create a coating technique in order to face the above reality to improve the quality of cast iron street lamps.

Conventional coating method of cast iron street light is post-treatment of castings cast in foundry factory by desalting and removing grinder work, assembling, processing and polishing by each part to coat as anti-rust paint, and to paint urethane varnish and bronze paint on it. It has been painted by the method.

However, this coating method is a trend of discoloration of paint, wear and corrosion in the paint and casting adhesion parts, cracks, submerged in between, rust leakage, damaging the beauty and landscaping, damage to the environment, renovation painting This is a costly reality.

The present invention has been developed to prevent such conventional inconvenience.

When the casting is melted at 1500 ℃ ~ 1800 ℃ and injected into the molding, the molten metal by Co ₂ reacts with a chemical reaction, and gases such as nitrogen, oxygen, and hydrogen are discharged to form exhaust holes. Although it is somewhat reduced in size, detailed minute vents remain, making the pores permanently needed for castings.

In addition, when the casting enters the cooling state, oxygen and moisture in the atmosphere invade into the pores, forming a film in a synergistic manner, and latent.

In this situation, the reality is that the rust-paint is applied, the color is painted according to the demand of the customer, and the varnish coating is applied according to the universality.

As a result, no matter how thorough the top and bottom is, after a certain period of time, it expands due to the synergy of moisture and oxygen latent in the casting pores and generates acid when the acid is released to the casting surface, forming a film. This causes rust and causes erosion cracking to the painted surface.

Here, there are many examples of discoloration and deterioration of the painted part of the street lamp main body by exposure to strong ultraviolet rays, which damages the urban aesthetics.

In order to solve this problem, the casting material supplied from the foundry factory is loaded into the heating furnace in the painting process through a predetermined pretreatment and mechanical processing process. Moisture and oxygen quench and maintain a vacuum.

At this time, by applying a strong adhesive rust preventive paint can prevent moisture or oxygen penetration from the outside while completely sealing the pores and can prevent the corrosion of the casting forever.

In addition, the finish coating on the coating before rust prevention can be prevented from fading or deterioration of the body of the lamppost by using the anticorrosive method (powder, liquid) by using a special coating resistant to UV rays and weathering. Will be functioning.

If the casting method of casting street lamp casting is improved, much management cost will be saved and pleasant city street culture and environmental landscape will be maintained, thus making clean and bright street.

This coating method is different from the general corrosion method, which is a known coating method.

That is, the general baking is to preheat the material in the preheating chamber according to the purpose of strengthening drying and adhesion as an acid treatment or alkali pretreatment in the pretreatment process of removing rust, foreign matter, oil, etc. on the iron plate. The method of passing the furnace of the casting product by heating is different from the meaning of electric preheating, and it is expelled by dissipating moisture and oxygen in the pores generated during the casting formation process, which is the only feature of the casting, and makes the pores in the vacuum state to make them adhesive. It is emphasized that when anti-rust paint is applied, the pores are completely sealed to prevent the ingress of moisture or oxygen from the outside to remove corrosion from inside, which is different from the pretreatment method on the iron plate.

Claims (1)

Before mechanically processing and painting the streetlight material supplied from the foundry, it is placed in a heating furnace and kept at 150 ℃ or more for 1 to 2 hours to quench latent moisture and oxygen in the pores of the casting surface to maintain the vacuum state and adhesion. Cast iron street lamp surface coating method that prevents moisture and oxygen penetration from the outside by applying the anti-corrosive paint to completely close the pores.