Do you understand the galvanizing method for pipe fittings?
There are several main methods for galvanizing pipe fittings, among which hot-dip galvanizing is the most widely used and mainstream method.
Method Comparison Overview
|
Galvanizing method |
hot-dip galvanizing |
Electrogalvanizing |
Mechanical zinc plating |
Zinc infiltration |
|
Process Principle |
Immerse the pipe fittings into molten zinc solution for metallurgical reaction |
The principle of electrolysis is that zinc ions are adsorbed onto the surface of the pipe under the action of current |
Cold weld zinc powder to the surface of the pipe fittings by mechanical impact at room temperature |
Heat the pipe fittings and zinc powder in the converter, and the zinc atoms diffuse into the surface of the steel |
|
Characteristics of Zinc Layer |
Thick, uneven, with zinc flowers, and extremely strong adhesion |
Thin, uniform, smooth, and shiny |
Medium, uniform, no zinc flowers, good adhesion |
Uniform layer thickness, dark gray color, no hydrogen embrittlement |
|
Corrosion resistance life |
Extremely long (decades) |
shorter |
moderate |
Long, close to hot-dip galvanizing |
|
cost |
moderate |
low |
lower |
higher |
|
Applicable pipe fittings |
The vast majority of carbon steel pipe fittings (butt welding, flanges, tees, etc.) |
Small size and high-precision pipe fittings (such as joints and fasteners) |
High strength components and parts that are sensitive to hydrogen embrittlement (such as springs and bolts) |
High strength components and parts that are sensitive to hydrogen embrittlement (such as springs and bolts) |
How to choose?
| Pursuing the longest anti-corrosion life and strength (such as outdoor structures, water pipelines) | Hot dip galvanizing is preferred. |
| Need for aesthetics and dimensional accuracy (such as small-diameter joints, instrument fittings) | Choose electroplating. |
| Handle high-strength or hydrogen embrittlement prone parts (such as bolts, springs) | Choose mechanical galvanizing or zinc infiltration. |
| Consider environmental factors | prioritize mechanical galvanizing or zinc infiltration. |
Summary
For the vast majority of industrial pipeline applications, hot-dip galvanizing is the standard and economical choice for galvanizing pipe fittings.
We are able to provide high quality galvanized pipe fittings such as tees, crosses atc. according to customers' needs and look forward to your purchase.
