New Corrosion-resistant Steel for Oil Pipelines

[Tom Kirkman + 8,860]

Yes, this is a PR press release.  But could be significant if this new steel works out and cheaply reduces corrosion in pipelines.

Material Scientists from NUST MISIS Create a New Corrosion-resistant Steel for Oil Pipelines

MOSCOW, Nov. 26, 2019 /PRNewswire/ -- The new Russian steel called Severkor for oil pipelines has been created by materials scientists at NUST MISIS in order to reduce the environmental risks of oil production and increase its efficiency due to increased corrosion resistance. A year ago, the first test pipe from the developed steel was installed at the Kokuysky oil and gas field in the Perm Krai territory in Russia. In the fall of 2019, Lukoil company has presented an expert opinion confirming Severkor's unique resistance to the aggressive environment of crude oil and salt solutions.  ...

 

... The corrosion rate in the pipe made of new steel was only 0.008 mm per year, that is, the depth of the deterioration from the corrosive liquid effect on the metal was less than the defects in the rolling mill.

"After a year of work in the oil field, the pipe remained virtually new. The new technology for the production of the rolled metal for the manufacture of longitudinal oilfield pipes ensured their real increased corrosion resistance," says Alexander Komissarov, one of the developers of the project, research fellow at NUST MISIS. "This result was obtained thanks to fundamentally new alloying schemes (adding dopants to the composition of materials to improve the properties of the base material), which provide the necessary structural and phase composition of steel in the production of rolled and flat products."

 

[footeab@yahoo.com + 2,194]

On 11/26/2019 at 5:29 AM, Tom Kirkman said:

thanks to fundamentally new alloying schemes (adding dopants to the composition of materials to improve the properties of the base material), which provide the necessary structural and phase composition of steel in the production of rolled and flat products."

So, skin deep.  Depth dependent by amount added.  Add (probably cobalt/Silicon/Tungstun powder) during the VERY HOT rolling stage.  Nice!  Another form, cheaper form, of explosive laminating.  Can be done because in piping, the amount of material in question is gigantic so it makes sense to set up an entire mill to do so. 

[SERWIN + 749]

.008mm comes out to .000315" a year loss from the friction of the oil moving through the pipe, and I have seen pipe so out of round it is very  visible when the threads are added to the ends, not very precise stuff from the mills. What is the machinability rating like though? I have worked with chromes and some other variants of the pipe and none of it is very tough to machine. How does it stand up to welding? Does welding or machining take away from the wear characteristics in the area they were done? It doesn't look like it is a coating, it is the structure of the material so it would be consistent through in regards to the material itself? What would be an average wear on other materials that are currently being used. Interesting indeed!