Guardrail paint is a special paint category, because it is mainly used for guardrail objects, so it is necessary to consider the outdoor environment and the specific temperature and weather conditions for processing, the relevant functional characteristics of the paint is also relatively high. As most of the friends who do not have relevant professional background knowledge, how to accurately find out the most appropriate fence paint on the market is very important. Taking this problem into account, today for you to introduce the information is the guardrail paint painting method and use content.
First, how to paint the guardrail
Scheme 1:
1. Surface pretreatment
Before brushing the surface of the steel members must be dust, floating rust into pieces of the rust layer oil collected clean treatment. The thickness of the residual rust layer is allowed to be less than 60um, allowing a small amount of solid and thin oxide skin to exist.
After injection treatment, the surface should be blown clean with dry, clean, oil-free compressed air.
After spraying, the defects revealed on the steel surface and weld must be treated.
2, coating preparation
Before use, anti-rust paint must be stirred until there is no deposition at the bottom and the top and bottom are uniform.
A small amount of anti-rust paint is prepared according to the proportion required by the instructions to ensure the thickness and quality of the single film.
The antirust paint is calculated according to the coating area and the thickness of single coating film, and the amount of ingredients is controlled within 6 hours, to prevent the amount of too much, coating timeout and excessive maturation and thickening of the coating film quality.
Mixed anti-rust paint can be sprayed after 100 mesh filter. Once the coating overreacts and thickens in the process of spraying, it is necessary to immediately stop the overreaction time of spraying anti-rust paint and the ambient temperature. The time required for high temperature is short, and the material should be less matched. On the contrary, the time required for low temperature is long, and the amount of ingredients should be increased appropriately.
3. Coating process
The specific construction of anticorrosive paint should be based on the anticorrosive structure of the preparation of coating process rules and measures to ensure the quality of anticorrosive coating.
The environmental conditions of coating shall comply with the requirements of the manual. In case of rain, snow, fog, sand and other climatic conditions should stop the open-air construction of anticorrosive layer. When the ambient temperature is lower than -5 ° C or higher than 40 ° C, or the relative humidity is higher than 80%, do not perform construction. Uncured anticorrosive coating should be protected from rain.
If rust occurs in the interval between the qualified surface pretreatment of the antirust paint and the application of the first primer, surface pretreatment should be carried out on the surface of the corroded part before coating.
When the anti-rust paint is used in the rolling coating method, the roller dipping material should be uniform, not too much, the rolling coating force should be uniform, and not too much, and should be maintained at a uniform speed; The roller should be rolled in the same direction, the direction of each pass can be different. Corners, accessories and other parts of the roller can not be coated should be painted with brush tools.
Scheme 2:1. Rust grinding
First of all, you need to use sand paper on the rust of the iron railings for a grinding, pay attention to the grinding must be clean, to rust and fast off the paint all grinding feeling.
2. Paint again
After a good anti-rust paint can brush the surface of the paint, then the paint must be mixed evenly, so that the paint color can be uniform and not easy to fall off.
3. Protection of finished products
After painting, we must pay attention to the protection of the finished product, that is to say, within 24 hours of painting, we should touch the paint, and there should be corresponding protection or tips to prevent them from touching inadvertently, waiting for the end of 24 hours, it will be OK.
Two, guardrail paint introduction
Guardrail paint is mainly used in ①, highway guardrail ②, railway guardrail, ③ airport guardrail ④, garden guardrail;
Metal guardrail paint is used for 1, metal steel structure 2, concrete structure 3, stainless steel 4, aluminum alloy 5, galvanized parts 6, magnesium alloy and other materials guardrail anti-corrosion coating
About the specific painting method of guardrail paint, we can refer to two schemes, of course, the specific choice also needs to be combined with the actual situation and the expected effect of analysis. But in general, the whole process should include the guardrail paint early processing, the actual painting and the protection of the later three plate content, this series of operations on the professional knowledge of the practical personnel requirements are relatively high, we can consult the painter to determine the appropriate product model and the specific procedure method.
