Electro-Galvanized VS Hot-Dip Galvanized (HDG) - What's the Difference?

You are the owner or the engineer working on a project. A subcontractor approaches you asking if they can use galvanized steel, instead of hot-dip galvanized steel as called out in the specifications and the project drawings. He says, galvanized steel is cheaper and more readily available and that using it can save you time and money. How would you answer?
Do you know the difference between the two?
This video discusses the difference between electro-galvanizing (zinc electroplating or simply, galvanizing) and hot-dip galvanizing (HDG). It compares the two in terms of processing, appearance, cost, durability and corrosion protection, and application.

[@littlebrookreader949]

The explanation was clear and concise without cutting the full explanation short. 👍👍 Excellent!

[@LorezaKabuhayan]

Thanks for the feedback,

[@kopongtheerasri82]

This video is very clear, Thank you so much.

[@jacobconner6506]

Thanks! Great vid. To the point and easy to understand.

[@LorezaKabuhayan]

Thanks for the feedback.

[@chittibabu586]

The subject explained very very clear

[@LorezaKabuhayan]

Thanks for the feedback.

[@najirkhanpahelwan5899]

Really useful 👍

[@LorezaKabuhayan]

Thanks for the compliment and support.

[@lornamazapaintingartshow2020]

Very interesting topic.

[@LorezaKabuhayan]

Thanks.

[@ganloadedninja5696]

Very nice content

[@LorezaKabuhayan]

Thank you.

[@jwbrooks55]

The only similarity between the two coatings is that they use the same medium (zinc).

[@LorezaKabuhayan]

Yes, they do use the same medium, which is zinc.

[@jackmewhalle6937]

I've been in this business for years. Your subcontractor is not cutting cost to get electroplated. That's all that's available to him. I know this because I've been in the business stucco for 43 years if anybody save money it would be the manufacture. We bought what was available we did not request it we had no choice. Then we had no idea that would rust away. I don't remember what year it was but I do remember when it happened and we had some metal stucco lath and it was bright and shiny and I asked my partner I said check this lath out why is it so bright and shiny? He said I don't know that's what they sent out. But that's all they had even our distributor had no play in that that's what they sent them. We always thought it might have been the EPA that changed it still doing my research to find out.

[@LorezaKabuhayan]

Thanks for sharing your insight.

[@jwbrooks55]

Electroplating is not a typical alternative to hot dip. The expected environments are simply too different. Typically weathering steel or 2-3 coat paint systems are the most common alternatives to hot dip galvanizing.

[@MeYou-ww9xk]

I miss the biggest negative part of E-galvanizing. If you have a pipe and you want it to be protected to the elements inside and outside, it's a fail with E-Galvanizing! It will do up to 10~15cm and that's it! Most of the people with Masters or PHD's in the mechanical field don't know this! Solution there is stainless steel 😊