guineapig Posted January 18, 2015 Posted January 18, 2015 Morning All Hopefully I will be receiving my NS Eccentric frame this week.Before I build the bike should I Tectyl inside the tubes or does the Chromoly 4130 only rust on the surface? ThanksGuineapig.
Chro Mo Posted January 18, 2015 Posted January 18, 2015 Use framesaver (from CEEway in the UK) or Boeshield T9 - should do you right.
King_Crispy Posted January 18, 2015 Posted January 18, 2015 It does rust. Protect it, especially if you're at the coast
the nerd Posted January 18, 2015 Posted January 18, 2015 Use framesaver (from CEEway in the UK) or Boeshield T9 - should do you right.As chro mo says. Framesaver. Guys will tell you to use this and that. Just buy framesaver and you won't have a worry.
Ryanpmb Posted January 18, 2015 Posted January 18, 2015 Morning All Hopefully I will be receiving my NS Eccentric frame this week.Before I build the bike should I Tectyl inside the tubes or does the Chromoly 4130 only rust on the surface? ThanksGuineapig.Four steel frame bikes. BoeShield T9 in all of them. No hassles so far. As suggested, you must apply some sort of anti rust protection.
Monark Posted January 18, 2015 Posted January 18, 2015 Damn... I never did that before building my new STR. where can I get T9 from? Will it damage my new paint job?
GoLefty!! Posted January 18, 2015 Posted January 18, 2015 Its not necessary to protect a steel frame unless you intend to immerse it in salt water for a year.Yes there will be corrosion from your sweat and sea air if at the coast but these steels are essentially stainless steels so the corrosion is not severe.If you want to add weight and attract dirt and other crap then coat the frame as suggested. your choice
the nerd Posted January 18, 2015 Posted January 18, 2015 If i lived in KZN i would use a frame saver type coating.
Butterbean Posted January 18, 2015 Posted January 18, 2015 Having just bought my dream frame, a ritchey road logic, I did a ton of research on rustproofing and protecting the frame. The only time I could find people saying it was a serious concern, was when reviewing products that "protect" the frames. If you do some research on chromoly, you'll find that of course, like and alloy containing (fe), it will rust. But it's normally just a light coat of rust on the surface and will never really get to be a problem. At least not in your lifetime. Speaking to my dad, who used to be into the road riding scene in the 80's, and living in Cape Town, he never once treated a frame. His garden engineer still uses one of those frames as a commuter (an English made Dawes touring frame). Pops used to take us out for rides on the beach with this bike. It lived in our outside shed for a good decade before it was used by my brother. It has a lot of chips and scratches from when it was stolen twice while my bro used it to get to school and back, an that frame is still going strong. Took a look inside the frame and yes - there was rust, but only surface. I took a wire brush to the seat tube, and lo and behold! Clean steel right underneath a light layer of surface rust. I'm not gonna waste my time "protecting" my steel frame. Not worth it.
GoLefty!! Posted January 18, 2015 Posted January 18, 2015 Exactly. I have owned Peugeot Rapport, Bridgestone RB2, Bridgestone MB2 (both made from japanese Chrome Molybdenum 4130 steeel, Bianchi Reparto Course, Raleigh (reynolds 531) and none of these bikes are ever coated internally and noone rusted beyond a light surace coat that was easily removed. I never removed that rust because if you did then it would rust again so I just left it realising that the rust was actually just preventing further corrosion. Its absolutely unnecessary to rust proof a quality ateel frame built from Reynolds, Columbus, Dedacchai, or Tange Chromo Molybdenum or Reynold 753 Manganese molybdenum tubing. But like I said, each to their own.BTW all the bikes I oned except the Bridgestone RB2 are still in circulation today. I donated the Bianchi to velokhaya after a respray and frame modernisation by Terry Dolan. The MB2 is hanging in a garage in Hout Bay somewhere. A pal of mine still uses his Colnago Master as a trainign and winter bike. That bike is a 1989 model and must have 5000km per year x 25 years (do the math) and it still has the original paint job and chroming with very little surface rust and tarnishing of the chrome. He wants to get it cleaned and resprayed so its ready for another 25 years
Monark Posted January 18, 2015 Posted January 18, 2015 Amazing stories... keep em coming! this is why I built my steel bike.
JXV Posted January 18, 2015 Posted January 18, 2015 ......... but these steels are essentially stainless steels....... Sorry boet Chromoly is far from stainless. The chrome content of 4130 is around 1% as opposed to 18 to 20% for stainless and there is no nickel whereas common stainless steels have about 8 to 10% nickel. Bike steels will rust but they rust slower than normal steel. For external protection the paint is enough if you take care of chips. Internally, tectyl or similar will work. Coat as much of the inside surface as you can reach but do it thinly and make sure any drain holes are opened once the coating is dry. Tectyl spray is waxy when dry and it may act as a lube for the seatpost so consider masking the seatpost area with a rag while applying elsewhere. If the bike will live inside and in a dry climate then maybe not necessary to do anything....but water gets in at the seatpost when you wash it. If it was my bike I would tectyl it.
HeyYou Posted January 18, 2015 Posted January 18, 2015 Some steel frames do rust, depends on how they are looked after. I have several tens of steel frames, going back 50 years for some of them and none is 'badly' rusted. If you look after the frame, it should last your lifetime. Edit: or is it are, just too late on a Sunday to care!!!
guineapig Posted January 18, 2015 Author Posted January 18, 2015 Thanks for the feed back. Always interesting to see the differing opinions.Being in Durban I will do a protective coating even though the bikes live in the house. Any local suppliers of the products mentioned, besides Tectyl? Once the frame arrives I know I won't be able to wait for an import.Half the joy is in the actual build.
GoLefty!! Posted January 18, 2015 Posted January 18, 2015 Sorry boet Chromoly is far from stainless. The chrome content of 4130 is around 1% as opposed to 18 to 20% for stainless and there is no nickel whereas common stainless steels have about 8 to 10% nickel. Bike steels will rust but they rust slower than normal steel. For external protection the paint is enough if you take care of chips. Internally, tectyl or similar will work. Coat as much of the inside surface as you can reach but do it thinly and make sure any drain holes are opened once the coating is dry. Tectyl spray is waxy when dry and it may act as a lube for the seatpost so consider masking the seatpost area with a rag while applying elsewhere. If the bike will live inside and in a dry climate then maybe not necessary to do anything....but water gets in at the seatpost when you wash it. If it was my bike I would tectyl it. Sorry boet but all the new steels used by Reynolds and Dedacchai are maraging stainless steels or precipitation hardening stainless steels. Stuff like 753 and the old 4130 were indeed not stainless but the chrome content was sufficient to resist corrosion. it was one of the requirements for 531 when it was developed for aerospace spaceframe use. 531 was first used in 1935 and was subsequently used to build the space frames for the Hawker Hurricane and Supermarine Spitfire as used during the 2nd World War. If you've ever seen a Spitfire at RAF Duxford or the SA war museum you will notice that the tubes are original and without rust. During the war the airframes internal structure was uncoated to save weight. Those same airframes are flying today... You want to promote the internal coating of the tubes then go ahead but all you're promoting is trapping of corrosive material. Products like tectyl are used were mild steel is used. Mild steels rust pretty quickly so the polar anti rust additives in tectyl provide a barrier to sea air but are not a barrier to accumulated water and acids from sweat. but hey what do I know. I just ride the bicycle Guinea pig, Tectyl is a product marketed by Shell Oi Products Africa. If you give their call centre a bell they will be able to direct you to the nearest reseller with stock.
GoLefty!! Posted January 18, 2015 Posted January 18, 2015 a worthwhile read and resource: http://reynoldstechnology.biz/assets/pdf/rtl_steel_alloys_extract.pdf
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