Yes, it is possible and you can easily install carbon seat posts in a steel frame but these have negative effects for long-term use because the complaint received after doping this setup is that the carbon seat posts would stuck badly within the steel seat tube frames. normal grasses are not used to et the seat post tubes but there are specific plain greases that are used to minimize the friction and resistance between the seat post tube and steel frames. but these greases are not used widely in greater amounts, because using them in n excess amounts would cause slipping, so you have to use them in a recommended amount. there is also another solution of carbon preparation which is sued to reduce friction, it is also a grease used for carbon seat posts, the mixture of this greases is manufactured in such a way that it contains small plastic and rubber materials within the mixture, which will prevent the slipping and skidding of the carbon seat posts within the steel frames.
But there are also instructions for using these carbon preparations, if this mixture would stay for a long time within the seat post tube then it will cause corrosion and rust, so after 6 months again uninstall the carbon seat tube and clean the tube thoroughly, service the tube with clean water and rub the tube with a rag cloth, leave for a few minutes to dry, and again apply the carbon prep mixture and recommended greases before installing within the steel frame. on a normal basis, carbon seat posts are more slippery than aluminum seat posts, due to which carbon pastes are used but in the recommended amount. carbon paste is more helpful and does not allow the carbon seat post to slip within the steel frame as compared to plain greases and other recommended lubes.
The weight of the rider also matters a lot for installing carbon fiber seat posts within the steel frames, if you aren’t a heavy rider then install them in your bike, and also carbon seat posts depend on the trails where you are going to ride with steel frame, more harsh and aggressive terrains are not beneficial for carbon seat posts because chances of breaking and cracking of the seat posts are present if you are a mountain biker and you are regularly riding on these harsh trails, but for road bikers, carbon fiber seat posts are usually recommended because these posts would also play a major role in reducing bike weight and provides smooth riding.
Never use non-recommended lubes and greases for the carbon seat posts, the reason is that there are many mixtures of greases that contain toxic materials sued in their manufacturing which are bad for carbon fiber material, only the recommended materials are used, there are two types of clamps for carbon seat posts, QR clamps, and bolts are tight with the help of a wrench, after using of recommended and carbon compatible greases then you also need a little bit extra rotating torque force to rotate the clamp and nut bolts of the carbon set post within the steel frame to reduce slippery environment within the seat tube.
Advantages Of Carbon Assembly Paste:
Carbon assembly pastes are used for carbon seat posts, these will prevent the seat post from seizing and freezing within the steel frames and you can easily extract the carbon fiber seat post from the steel frames. carbon fiber seat posts do not bend ad deform after applying a large rotating torque force and carbon assembly pastes would prevent carbon fiber from sudden breaking and cracking.
Corrosion is not a major problem with this setup with the carbon fiber seat post and steel bike frame, but corrosion is only produced and causes a big issue with the luminum and tiotanium bike frames, but in this case, corrossion does not cause any effect to this setup.
If you are using grease for this purpose then it will also not affect the carbon fiber material but grease isn’t used for carbon fiber seatpost to avoid a slippery environment.
The best and recommended product used for this setup is carbon asssembly paste.
Saltish And Moisture Containing Trails:
If you are constantly riding through those places, roads, and trails that contain salt within the water, then it will increase the chances of corrosion within the carbon fiber seat posts, if you are riding in winter seasons and the roads are full of saltish snow then avoid carbon seat posts, replace them with the aluminum seat posts. because saltish environments and moisture-containing trails are the two main causes of promoting and raising the destruction of carbon material.
Anodized Seat Posts And Steel Frames:
If the corrossion has abvdly affected the frame or seatpost then you can easily anpodized the same bike part from anodizing stores or with the help of youtube videos. anodizing is a process that will increase the lifespan of the bike parts and also removes corrossion.
Avoid Carbon Seat Posts From Paint Removal Chemicals:
If you are using harmful and toxic chemicals which are used for removig of bike paints, then these chemicals would badly affect the carbon fiber seat posts and will destroy the internal layers of the fiber, so you have to avoid your carbon fiber seat posts from these kinds of harmfull products.