Knowledge

14Feb, 2025

Characteristics of Steel-Plastic Composite Pipe
Strong Corrosion Resistance: The inner plastic layer possesses excellent corrosion resistance, capable of withstanding the erosion of various chemical media such as acids, bases, a
13Feb, 2025

Steel-Plastic Composite Pipe
The steel-plastic composite pipe is a composite material made by combining an inner plastic pipe with an outer steel pipe through a specific manufacturing process. This structure e
13Feb, 2025

Treatment of Zinc As
The treatment methods for zinc ash can be divided into wet and pyrometallurgical processes. The pyrometallurgical process, also known as distillation, leverages the fact that the b
13Feb, 2025

Treatment of Zinc Slag
The treatment methods for zinc slag can be divided into two categories: wet process and pyrometallurgical process. For the pyrometallurgical process, distillation is the core metho
13Feb, 2025

Treatment of Exhaust Gas
Treatment of Acid-Containing Exhaust Gas There are two methods for treating acid-containing exhaust gas. Firstly, during the construction of workshops, a ventilation structure with
13Feb, 2025

Treatment of Waste Passivation Solution and Waste Phosphating Solution
Recovery of Chromic Acid Solution: Passivation solutions containing hexavalent chromium are not allowed to be discharged. Currently, cationic exchange resins are commonly used to f
12Feb, 2025

Treatment of Waste Alkali Liquor and Flux Waste Liquor in the Hot-Dip Galvani...
The treatment of waste alkali liquor and flux solvent waste liquor generated during hot-dip galvanizing typically involves waste alkali liquor containing oil contamination, dirt, a
12Feb, 2025

Treatment of Waste Acid Baths in the Hot-Dip Galvanizing Process
The waste liquids discharged during the acid bath process include sulfuric acid waste and hydrochloric acid waste. Large and medium-sized enterprises typically need to dispose of o
12Feb, 2025

Causes of Black Spots on Bright Galvanized Coatings After Passivation
The appearance of black spots on the galvanized coating of bright hot-dip galvanized steel pipes after passivation treatment is primarily due to impurities such as copper, iron, an
12Feb, 2025

Reasons for Controlling the Concentration of Passivation Solution
As previously mentioned, the passivation film on the galvanized layer of galvanized steel pipes is generally yellow in normal conditions. However, after batches of galvanized steel
12Feb, 2025

Reasons for Strictly Controlling the Temperature of Chromate Passivation Solu...
When galvanized steel pipes undergo passivation treatment in a passivation solution, the temperature of the chromate passivation solution used should be strictly controlled to belo
11Feb, 2025

What is the color of the passivation film on galvanized steel pipes?
The color of the passivation film primarily varies depending on the concentration of hexavalent chromium and the thickness of the film. When the concentration of hexavalent chromiu

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