Cold galvanizing paint and guide to solve common mistakes

8/29/2022

The introduction of cold galvanizing paint is a solution to protect iron and steel structures against corrosion and oxidation caused by the environment and weather. This article will help you answer some of the most common problems with this type of paint.

Overview of some information about cold galvanizing paint that you need to know

Cold galvanizing paint is a coating produced to protect metal constructions, namely iron and steel. The effect of paint is to help iron and steel materials avoid oxidation and impacts from the natural environment and harsh conditions in order to prolong the life and quality of the work over the years of use. In addition to the metal protection function, this paint is also used to increase the aesthetics of iron fences, light boxes, iron doors, etc. The paint will give the surface of the material a beautiful, shiny color and also to be Anti-yellowing, resistant to chemical impacts.

This paint currently has 2 types, which are 1-component and 2-component types. In particular, 1-component galvanized paint is a paint that does not need to be mixed with any other materials, bought and used immediately, so it is quite convenient and cost-effective. Meanwhile, 2-component paint has higher durability but is a bit more complicated to use than 1-component paint because it is necessary to mix 2 types of ingredients in a certain ratio, and the price of this product is high. slightly more than the 1-component type.

How to fix common mistakes when using cold galvanizing paint

If you use galvanized paint for the first time, it inevitably encounters basic mistakes. Here are some mistakes that users often make during use, and we will also suggest how to fix them when you accidentally encounter these errors.

Choose a regular one instead of using cold galvanizing paint

Currently, many people still mistakenly believe that paint for galvanized iron is the same as paint for ordinary iron due to the habit of using black iron. However, paint for galvanized iron and paint for black iron are completely different types. Black iron often uses oil paint on the anti-rust primer. If using oil paint for galvanized iron, the paint will quickly peel off in a short time, because the adhesion ability of oil paint is usually not high.

The solution is that you should choose cold galvanizing paint to use for galvanized iron instead of regular oil paint Because this paint is specially formulated for galvanized iron products with components synthesized from acrylic resin for adhesion. High adhesion, durable color, does not cause peeling and does not require additional anti-rust primer.

Before galvanizing the surface of the material is not properly treated

A small mistake that users often make is not carefully cleaning the surface to be coated with galvanized paint. Metal surfaces that are not properly cleaned and fixed will cause the paint to peel off very quickly. Here's the fix for some material surfaces:

For the new galvanized iron box, the appearance may look very clean, but the surface is still not really smooth and smooth. So you need to clean and shape the paint to be better mechanically bonded, the paint will be sprayed evenly on the metal surface without blistering and peeling.

For galvanized iron that has been weathered or oxidized, corroded after a period of use. Then the surface of the material needs to be cleaned (surface Preparation) by thermal spraying, primer or using acrylic pretreatment techniques.

How to apply cold galvanizing paint in non-standard conditions?

After painting, you find moisture appearing, the cause may be because moisture is trapped in the zinc surface, which expands and creates air leakage, causing blistering on the painted surface. Or sometimes the surface to be painted has not been completely dry, acidic residual moisture comes in contact with the zinc to form a corrosion reaction. In addition, humid air also significantly affects the adhesion ability of the paint.

The solution is to clean the layer of dirt, grease with alcohol or industrial gasoline so that the surface to be painted is completely dry. Only apply at the temperature and humidity conditions specified by the manufacturer.

Cold galvanizing paint has high adhesion properties, dries quickly and does not require additional primer before application. However, to achieve the highest quality after painting, you should pay attention to not make common mistakes.

Learn more: Advantages and drawbacks of passive fire protection

Search This Blog