Hello, why is the welding wire prone to discoloration and rust in summer, and how to solve it?

It is necessary to be optimistic about what kind of material is not the plated welding wire, which is an alloy material, not a stainless steel wire, and it can rust if it is not stored well. Some laser wires are coated with a thin layer of weld quality because this anti-rust layer is equivalent to impurities during the welding process. In particular, the welding wire for welding mirror molds is not suitable for plating anti-rust layers.

Assuming that the welding wire is rusty, the surface of the welding wire is rusted with sandpaper, the welding wire is dirty, the quality of the packaging is poor, and there is a lack of post-disposal process according to the anti-corrosion request. However, this layer is bright and can be used without affecting the quality of the weld.

Copper-plated welding wire is easy to rust There are many reasons for the rust of copper-plated welding wire, such as dense acid mist in the workshop, incomplete cleaning of the welding wire, poor quality of the plating layer, and the performance of the process is not severe, such as the fundamental anti-rust substance that is easy to rust by hand or oiled copper welding wire. Because the anti-corrosion of copper to iron is cathodic protection, it must be fine and non-porous to achieve the anti-corrosion policy. However, the copper plating gas shielded welding wire is subject to the copper content.

The anti-rust layer of the plating should not be too thick, otherwise it will also affect the cause.

The fundamental reason why copper-plated welding wire is easy to rust is electrochemical corrosion. Starting from the principle of electrochemistry, the selection of copper plating as the anti-corrosion layer of gas shielded welding wire is unreasonable constraint, and it is not possible to obtain a fine and non-porous copper plating layer.

In summer, the air is more moisture, put it in a dry place, you look at the welding consumables management.

First of all, because of the high moisture content in the air in summer, which leads to rust, and secondly, the high temperature in summer can speed up the reaction. You can add some desiccant or something, such as quicklime

Metal rusting is both a common phenomenon and a complex process. Rust is the process by which metal and air interact with oxygen, carbon dioxide, and water vapor. There are many factors that affect metal rust for the following reasons:

1. Generally speaking, the purer the metal, the less likely it is to rust. Ordinary iron rusts when it encounters humid air, while a piece of pure iron does not rust in water. The metal weld is generally not a blue pure iron, which is easy to rust.

2. The processing method also has an impact on rust. After a piece of iron plate is broken with a seam, and then it is knocked flat, the rough part of the fold is easy to rust.

3. The smoothness of the metal surface is also related to rust, the smoother the surface, the less likely it is to rust, and the rougher it is, the easier it is to rust. Where the metal encounters local overheating or knocking and produces thermal or mechanical stress, the rust will also be faster.

I don't know what material you're talking about, some materials you refer to.

Laser welding wire is an alloy material, not stainless steel wire, and it may rust if it is not stored well. Some laser welding wires are coated with a thin layer of anti-rust substance on the surface, but.

The anti-rust layer should not be too thick, otherwise it will also affect the welding quality, because this anti-rust layer is equivalent to impurities during the welding process. In particular, the welding wire for welding mirror molds is not suitable for plating anti-rust layer. If the welding wire is rusty, use sandpaper to beat the surface rust layer until it is shiny, and it can be used without affecting the welding quality.

Copper-plated welding wire is prone to rust.

There are many reasons for the rust of copper-plated welding wire, such as heavy acid mist in the workshop, incomplete cleaning of the welding wire, poor quality of the plating, poor process execution, such as contact with the finished welding wire by hand or oily gloves, etc., as well as poor packaging quality, lack of post-treatment process based on anti-corrosion requirements, etc. However, these are not the root causes of the rust of copper-plated welding wires.

The fundamental cause of rust in copper-plated welding wire is electrochemical corrosion. From the principle of electrochemistry, it is unreasonable to use copper plating as the anti-corrosion layer of gas shielded welding wire. Because the anti-corrosion of copper to iron is cathodic protection, it must be dense and non-porous to achieve the purpose of anti-corrosion.

However, it is impossible to obtain a dense and non-porous copper plating layer of copper plating gas shielded welding wire when the copper content is limited.

It has little to do with the weather, at most in winter, because the weather is dry, there will be a little more impurities in the air.

The reason is the existence of impurities and dust, dust, iron filings, sand and other impurities in the air, most of which are hygroscopic, and once they fall on the resistance welding, they will become the crystallization center. The water molecules in the air condense here, so that the surface of the resistance weld is in a wet state for a long time, and it is easy to produce spot rust. Dust and other corrosive agents also have the property of adsorbing other corrosive agents, so acidic gases such as sulfur dioxide and chloride in the atmosphere accelerate the corrosion of welds.