Chem-Galvanising

rain-coat SG

Is it considered sacrificial protection?

OasisBlue SG

it's more of a protective layer instead of sacrificial.

Evo4eva SG

galvanised iron/steel into the zinc,that act like a paint lidat??..
the textbook write it is a type of sacrificial protection Laughing ..

OasisBlue SG

my book says its protective layer as it forms a thin film e.g. zinc layer over another metal such as tin.

whereas, sacrificial protection is more of attaching a more reactive metal to a less reactive metal. the more reactive metal will corrode in place of the less reactive metal.

then again, both protective layer and sacrificial method may be accepted i guess.

wishboy SG

Galvanising the more reactive metal got touch the less reactive metal
Sacrificial Protection the more reactive metal nv touch the less reactive metal
not sure whether correct anot

nonetheless, i m sure Galvanising =/= Sacrificial Protection
either one is a part of the other

jus like a Base and an Alkali
all alkalis are bases but not all bases are alkalis

Darkness_hacker99 SG

Answering to ThreadStarter's question, Yes. Galvanizing is the technique, Sacrificial protection is the mechanism.

Quote from my Chemistry Textbook

The common example of using a more reaction metal to prevent the rusting of iron, is galvanized iron. Galvanized iron is steel coated with zinc metal. The zinc protects the iron by corroding in place of the iron. Even if the zinc layer is broken or scratched, and air and water reaches the iron underneath, the zinc still protects the steel. The type of rust prevention is called Sacrificial Protection. The zinc is 'sacrificed' to protect the iron.