Galvanize guides and Technicals
Hot dip galvanizing is a process of galvanizing in which steel and iron and molten zinc are used. Iron and steel are dipped in molten zinc in order to make a final product which is safe from problems of corrosion and rust. As a result with the help of hot dip galvanizing the useful life of iron and zinc is increased to many years. There are many benefits of hot dip galvanizing. Due to these benefits the process of hot dip galvanizing is used on a large scale. When iron and steel are treated with molten zinc then the end product is a strong metal which gives different types of benefits.
1. Discharge or vent holes
How to make holes
Before you start, insert the proper size drill bit into the drill motor. Begin with a smaller drill tip to create a test hole if you are drilling a large diameter hole in the galvanized metal.
Where should these hole be in the metal?
The both steel should have two holes at the end and should be diagonally opposite for the external holes be place closed to the connection as possible
Example of a material with insufficient Discharge holes?
Causes: Insufficient or lack of fusion at the weld toe
Effects:
- Poor venting of mold and cores.
- Ungalvanized areas on the metal
- Insufficient drying of mold and cores.
Why Vent holes important?
Levels of protection from corrosion are increased and a double barrier is made which increases the life of metals.
2. Notches
Why Notches important?
- Notches minimize accumulation of ash
- Notches allow fluids quickly flow in and out
Example
Notches and cropped Corner in stiffener plate and in end welded plate
Some perfect examples of material with absence of cropped corner
The double oxide films, air pockets, ash and fluids may get stuck between stiffener plates and joints. As a results, that surface remain uncoated.
3. Material Condition
Example
Vanish – Covered Pipes
Perfect example of markings on material with oil – based markers
Example
Painted Materials
Example
Painted Member on handrail
Example of mill scale remaining on Heavily – Rusted material
The areas coating with heavy mill scale may also be found flaking after galvanizing
4. Hooking and Lifting points
Why hooking and lifting points important?
These points are important to allow fluids to flow in and out quickly and steadily and for the loading of the materials on jigs when done properly
Example
Best Material with well- Positioned holes