In the mechanical engineering, steelmaking, industrial components and metalworking industries, galvanizing chemicals are considered one of the important solutions to help protect material surfaces from oxidation and corrosion. However, in order to create a coating that is durable, bright and beautiful and meets export standards, the right selection of chemicals and control of the surface treatment process are decisive factors.
Many businesses today still face the situation of the plating being burned, pitted, peeling off or quickly deteriorating even though they have invested in a modern plating system. According to experts in the surface treatment industry, the cause largely comes from the quality of galvanizing chemicals and the imbalance in the operating process.
Galvanized – “Armor” that protects metal from harsh environments
Galvanizing is a method of applying a layer of zinc to a metal surface to create a protective layer against oxidation, limit rust and increase product life.
Thanks to this coating, steel, iron or alloy materials can be more resistant to moisture, salt, chemicals and the effects of the industrial environment. Not only improving durability, galvanizing also helps increase the aesthetics of the product with a brighter, more uniform and professional surface.
Currently, galvanizing technology is widely applied in:
- Steel and galvanized steel industry
- Mechanical Components
- Industrial Equipment
- Construction Structure
- Cars and motorcycles
- Electrical and Household Appliances
Zinc plating chemicals play a crucial role in improving the quality of the plating layer
Classification of common galvanizing chemicals today
Depending on the technology and technical requirements, galvanized chemicals are now divided into various groups. Each type possesses its own advantages in terms of durability, corrosion resistance and environmental friendliness.
Acidic Galvanizing Chemicals
This is a line of chemicals that are quite commonly used thanks to its ability to create a coating with good adhesion and uniform distribution on metal surfaces.
The advantages of the acid system include:
- Easy to apply
- Reasonable cost
- High efficiency with complex parts
- Limit chemical evaporation during operation
Thanks to its ability to create an evenly thick zinc layer, acid systems are often used in large-scale industrial plating lines.
Non-Cyanide Alkaline Galvanizing Chemicals
Modern manufacturing trends are increasingly prioritizing safe and environmentally friendly solutions. Therefore, cyanide-free alkaline galvanized chemicals are being widely used in many countries such as Japan, South Korea and Taiwan.
This line of chemicals has many advantages:
- Reduced Toxicity to Operators
- Limiting environmental pollution
- Increase the shine of plating
- Easy to carry out the passivation process
This is considered a suitable solution for businesses that are moving towards green production standards.
Cr³⁺ Passive Galvanizing Chemicals – A New Technology Trend
In recent years, Cr³⁺ passivation technology has become a prominent trend in the metal surface treatment industry.
Unlike traditional Cr6+-containing technologies, Cr³⁺ chemicals arebetter for the environment but still ensure:
- High corrosion resistance
- Outstanding coating durability
- Good aesthetics
- Meets stringent international standards such as RoHS and REACH
In particular, this technology is suitable for mechanical products, machines or materials that are frequently subjected to friction and high temperatures.
Common problems with galvanization
Although technology is increasingly modern, many businesses still encounter many errors in the plating process if the chemicals are not of good quality or the treatment process is not optimal.
The plating is darkened, brittle or flaky
This is a fairly common error in acid plating systems when the solution is unbalanced or the gloss content is not suitable. The coating is then brittle, reduces adhesion and deteriorates quickly.
The plated surface is pitted, rough or prickly
The cause usually comes from:
- The solution is contaminated with impurities
- Unstable pH
- Poor filters
- The plating current is too high
These errors not only affect aesthetics, but also reduce the corrosion resistance of the coating.
Burnt or spotted plating
When the metal concentration is low, the temperature is inappropriate, or the current exceeds the allowable level, the plating may appear surface burning or the formation of uneven color spots.
Poor adhesion and blistered plating
This is a sign that the metal surface has not been completely cleaned before plating or the chemical is contaminated with organic impurities.
According to technical experts, the surface pretreatment stage can determine more than 70% of the quality of the final coating.
DK Chemicals – Metal surface treatment solution according to the trend of green technology
In the context of the industry’s increasing requirements for coating quality and environmental standards, DK Chemicals is becoming the partner of choice for many mechanical, steel and galvanized steel enterprises in Vietnam.
The company specializes in providing metal surface treatment and passivation chemical solutions such as:
- Galvanized Chemicals
- Chemical passivation
- Pretreatment Chemicals
- Degreasing and rust removal solutions
- Chrome-free solution
- Cr³⁺ Passivation Technology
In particular, DK Chemicals currently offers high-tech product lines from the PrimeCoat® brand, which stand out for outstanding corrosion resistance for zinc corrugated iron, cold corrugated iron and ZAM corrugated iron.
PrimeCoat® Z838-4P – New Generation Cr³⁺ Passivation Technology
One of the prominent solutions today is the PrimeCoat® Z838-4P series, which uses advanced SILANE technology, which helps to create an optimal protective coating for metal surfaces.
These products possess many advantages:
- Cr6+ Free
- Environmentally friendly
- RoHS and REACH compliant
- Effective anti-fingerprinting
- Increased corrosion resistance in harsh environments
This is considered a suitable solution for businesses that are aiming for sustainable export and production standards.
The inevitable trend of the metal surface treatment industry
Along with the development of the steel, mechanical and industrial manufacturing industries, metal surface treatment technology is shifting sharply to high-performance, cost-effective and environmentally friendly solutions.
In the increasingly fierce competition of the modern manufacturing industry, the quality of plating is no longer only a technical factor but has become an important competitive advantage of enterprises.
And in that trend, comprehensive solution providers such as DK Chemicals are playing an important role in helping businesses improve product quality, optimize processes and meet increasingly stringent international standards.
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