Knowledge

07Jan, 2025

Internal and External Factors Influencing the Pickling of Steel Pipes
The composition, structure, processing, and surface condition of the steel pipe itself, as well as the composition, structure, thickness, and uniformity of the iron oxide scale on
07Jan, 2025

The Impact of Iron(III) Chloride (and Iron(II) Chloride) Content in Hydrochlo...
It is known that when hydrochloric acid solution is used for pickling steel pipes, industrial hydrochloric acid is directly employed for this purpose, which allows for a faster pic
02Jan, 2025

Advantages and Disadvantages of Pickling Steel Pipes in Hydrochloric Acid
Advantages: The pickling process is relatively fast. The erosion of the base metal of the steel pipe is minimal, thus saving steel consumption. Hydrogen diffuses less into the base
02Jan, 2025

Optimal Temperature and Concentration for Pickling
When the concentration increases from 2% to 25%, the pickling rate of the hydrochloric acid solution increases by 10 times. When using hydrochloric acid solution to pickle steel pi
02Jan, 2025

Reasons for Pickling Steel Tube Billets
The purpose of pickling steel tube billets is to remove the iron oxide scale formed on the steel tube itself and during welding. Even though some of the iron oxide scale may peel o
02Jan, 2025

Factors Influencing the Lifespan of Hot-Dip Galvanized Zinc Coatings
(1) Thickness Factor Thickness Range: The thickness of hot-dip galvanized zinc coatings directly impacts their lifespan. Generally, controlling the zinc coating thickness within th
02Jan, 2025

Principles of Corrosion Protection by Zinc Coatings
Using zinc coatings to protect the underlying steel substrate from corrosion, or to minimize it, has proven to be highly effective in typical atmospheric conditions. The corrosion
20Dec, 2024

Main Factors Determining the Corrosion Rate of Zinc Coatings
The corrosion rate of zinc coatings varies depending on the nature of the zinc salts (corrosion products) formed on the surface of the zinc coating under various conditions. If the
20Dec, 2024

The reason for the initially faster corrosion rate of zinc coatings
The freshly hot-dip galvanized zinc coating has no protective layer covering its surface, which results in a relatively fast corrosion rate initially. However, once a layer of corr
20Dec, 2024

Corrosion of Zinc Coatings in Oil Fields
With the development of the petroleum industry in China, galvanized steel pipes are increasingly used as pipelines for transporting crude oil in oil fields. Therefore, zinc coating
20Dec, 2024

Corrosion of Zinc Coatings on Buildings
The corrosion of zinc coatings on buildings is related to the properties of the building materials. For instance, cement and lime mortar have high alkalinity, which can be highly c
20Dec, 2024

Corrosion of Zinc Coatings in Soil
Zinc coatings can form a protective zinc carbonate layer in certain types of soil, providing anodic protection to the steel pipe substrate. However, the effectiveness of this prote

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