Fire retardant coating vs. anticorrosive coating. What is the difference and connection between the two?

Fireproof coatings: Special coatings used on flammable substrate surfaces to change the combustion characteristics of material surfaces to prevent the rapid spread of fire, or on building components to increase the fire resistance limits of components.
anti-corrosion coatings: under normal conditions, metals, etc. play a role in anti-corrosion, to protect the life of non-ferrous metals used.the two work together on steel structure projects, there are both links, but also a certain difference
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construction order
steel structure project anti-corrosion and fire-resistant cases, the normal order is: rust removal, anti-corrosion primer, anti-corrosion intermediate paint, fireproof paint. When there is fireproof paint, it is theoretically possible not to apply anti-rust intermediate paint and finish, but only after applying anti-rust primer fireproof paint.Tips:
♦ if there are certain requirements for aesthetics, fireproof coatings can be applied between the middle paint and the finish or between the primer and the middle paint.
♦ should not produce a chemical reaction between the fireproof coating and the various layers of anti-rust coatings that come into contact with it.
Sergency Note
Surface Treatment
steel structure surface to blast rust removal, rust removal grade is not lower than Sa2.5, rust removal quality in line with the "pre-coating steel surface rust grade and rust removal grade" requirements, surface roughness reached 40 to 701LLm.
the problem of
if the anti-rust coating and fire-resistant paint do not match, will directly affect the fire-resistant paint fire performance. If there are certain decorative requirements, fire paint can be applied between the middle paint and the finish or between the primer and the middle paint.
compatible to take into account the contact with the coating, such as the formal situation: zinc-rich primer , epoxy cloud iron , fireproof coating , varnish, the need to do compatible testing with fireproof coating is: cloud iron intermediate paint and fire protection paint;
:
♦ compatible between fireproof coatings and anti-corrosion coatings: no chemical reaction should be generated between fireproof coatings and the rust-resistant coatings that come into contact with each layer.