The car giant started by marrying the daughter of the king

Chapter 118: That's all the shortcoming? It's nothing!
The name Daklo doesn't sound like a Chinese name at first glance.

When Jiang Hui communicated with Liao Chengwen and Zhu Jiansheng, he habitually used Dacromet surface treatment technology to introduce them.

However, when Zhu Jiansheng formed a professional project document, he would definitely have to change the name.

Zhu Jiansheng stayed up all night to write the report titled "Feasibility Analysis Report on Immersed Zinc Flake/Chromate Dispersion Coating".

Of course, this is definitely just a preliminary version, and many situations need to be discussed with Jiang Hui.

So early the next morning, Zhu Jiansheng, with dark circles under his eyes, brought Associate Professor Lai Yongfeng to the Capital Automobile Manufacturing Plant to find Jiang Hui to complete the report.

As an expert in chassis technology, Lai Yongfeng is the person most proficient in surface treatment technology in the Department of Vehicle Engineering.

After all, almost all parts on the chassis need surface treatment before they can be installed and used, otherwise they will rust within a few days.

Lai Yongfeng has studied various surface treatment technologies including electrogalvanizing, electrocadmium plating, hot-dip galvanizing, hot spray zinc, mechanical galvanizing, and zinc-based alloy plating.

The most important thing is that he is considered a staunch supporter of Zhu Jiansheng in the Department of Automotive Engineering.

"Xiao Jiang, my report has already written out the basic principles of the Dacromet process, the basic formula, the idea of ​​the preparation process and the method of coating detection. The framework of the report has also been established."

"Now I am thinking about adding more information about the advantages and disadvantages of this process, its main application scenarios, and the standard requirements of the process, so that I can formally propose it to the college."

Zhu Jiansheng handed the report he had written late at night to Jiang Hui, and quickly expressed his thoughts.

The credit goes to my son-in-law, so now is not the time to be modest.

The important thing is to implement the technology as soon as possible.

"Dacromet is a new type of surface treatment technology. Compared with the traditional electroplating process, it is a kind of 'green electroplating', which is very environmentally friendly. This aspect is not taken seriously in China. I think you can highlight it in the report. When it is brought up again in the future, everyone will be able to feel your foresight."

Jiang Hui had a lot of things to do every day, and there was no need to be polite with his father-in-law, so he just got straight to the point.

"Its biggest advantage is definitely its super corrosion resistance. Although its thickness is only 4-8μm, its anti-rust effect is more than 7-10 times that of traditional electrogalvanizing, hot-dip galvanizing or paint coating methods."

"According to my speculation, standard parts and pipe joints treated with Dacromet technology will not rust after 960 hours or even more than 1200 hours of salt spray testing."

"The second important advantage is that its processing technology determines that there is no hydrogen embrittlement after Dacromet surface treatment, which is very suitable for coating stress-bearing parts."

When Jiang Hui said this, Lai Yongfeng next to him interrupted and asked, "Why is there no hydrogen embrittlement?"

Hydrogen embrittlement is a drawback that cannot be completely overcome by traditional galvanizing process.

Generally, the electroplating process uses pickling, electrolytic degreasing, electrodeposition and other processes, which will cause hydrogen embrittlement of the workpiece and seriously affect the quality of high-strength parts.

Now that he heard that there was no hydrogen embrittlement after Dacromet surface treatment, Lai Yongfeng became excited.

"Since Dacromet technology does not require any acid treatment during the processing process, and there is no hydrogen permeation problem during electroplating, and the coating is cured at high temperature, the process ensures that the Dacromet coating will not suffer from hydrogen embrittlement."

“This allows it to be used in corrosion protection applications for high-strength parts that require high tensile strength.”

They were all professionals, so Jiang Hui gave a simple explanation and Lai Yongfeng understood.

"Are there any other advantages?" Zhu Jiansheng took a pen and wrote down quickly.

"Dacromet can resist high-temperature corrosion, with a heat resistance of over 300°C, while the traditional galvanizing process will peel off and become scrapped when the temperature reaches 100°C."

"In addition, its coating has good bonding with the metal substrate and strong adhesion with other additional coatings. The treated parts are easy to spray and color, and its bonding strength with organic coatings even exceeds that of phosphate coatings."

"In addition, the good permeability of this process cannot be ignored."

"Due to the electrostatic shielding effect, it is difficult to electroplate zinc on deep holes, narrow slits, and the inner wall of pipes in traditional electroplating processes. Therefore, these parts of the workpiece cannot be protected by electroplating."

"And Dacromet can enter these parts of the workpiece to form a Dacromet coating."

"Finally, as I just mentioned, this process will not produce wastewater or waste gas that pollutes the environment during the entire process of production, processing and workpiece coating. It does not require the treatment of three wastes, which reduces the treatment cost. It will definitely be the development direction of surface treatment in the future."

Jiang Hui introduced several advantages of Dacromet to Zhu Jiansheng and Lai Yongfeng in one breath.

This gave both of them more confidence in this project.

"This surface technology is so excellent, isn't there any disadvantage?"

Lai Yongfeng was not trying to find fault on purpose, but he just found it a little unbelievable.

Zhu Jiansheng pulled me here early this morning to discuss the Dacromet process. Although Zhu Jiansheng had already given him a general idea of ​​the situation on the way, he still felt a little dazed.

Before we knew it, such an excellent surface treatment process emerged?
I have never heard of it before.

"Of course there is!"

Jiang Hui doesn't mind telling everyone about Dacromet's shortcomings. After all, these problems will be exposed sooner or later. It is better to make them clear at the beginning and avoid these problems in the future.

"The surface hardness of Dacromet is not high, the wear resistance is not good, and the products coated with Dacromet are not suitable for contact and connection with copper, magnesium, nickel and stainless steel parts, because they will produce contact corrosion, affecting the surface quality and anti-corrosion performance of the products."

"Another problem is that the surface color of Dacromet coating is single, only silver-white and silver-gray, which is not suitable for the development of personalized needs."

Jiang Hui quickly summarized the problems, but Lai Yongfeng's reaction was very strange.

"Are these the only shortcomings?"

Obviously, in his opinion, these shortcomings are not a big problem at all.

"The conductivity of Dacromet coating is not very good, so it is not suitable for parts with conductive connections, such as grounding bolts of electrical appliances."

Jiang Hui continued to find a flaw, but this made Zhu Jiansheng and Lai Yongfeng feel more relieved.

Because the impact of these shortcomings is very limited or even negligible.

"According to your introduction, this technology can be fully utilized in many fields such as automobile industry, wood construction, electricity, chemical industry, marine engineering, household appliances, railways, highways, bridges, tunnels, shipbuilding, military industry, etc. It has extremely broad application prospects."

Zhu Jiansheng's enthusiasm suddenly became even higher.

(End of this chapter)