I too was taught at a young age to leave cold firearms in the garage, or screened porch until my hunt was over for good or the gun could be wiped down and oiled. They also were left out of the case due to the fleece or foam holding moisture and causing rust.
Condensation isn't just attracted to the outside either, it gathers in the bore and action too and hangs there if the air is warm and humid enough.
"Saepe errans, numquam dubitans --Frequently in error, never in doubt".
The trouble with the Internet is that it's replacing masturbation as a leisure activity. ~Patrick Murray
Let's deal with the first of your two original criticisms, electrolysis:
Download two papers from the UK National Physical Laboratory. I selected these because they specifically deal with the prosaic subject of iron corrosion.
First, download Basics of Corrosion Control:
http://www.npl.co.uk/upload/pdf/basi...on_control.pdf
Go to pages 2 & 3:
Now, download Electrochemistry of Corrosion with Figures:CHEMISTRY OF CORROSION
Common structural metals are obtained from their ores or naturally-occurring compounds by the expenditure of large amounts of energy. These metals can therefore be regarded as being in a metastable state and will tend to lose their [Gibbs Free] energy by reverting to compounds more or less similar to their original states. Since most metallic compounds, and especially corrosion products, have little mechanical strength a severely corroded piece of metal is quite useless for its original purpose.
Virtually all corrosion reactions are electrochemical in nature, at anodic sites on the surface the iron goes into solution as ferrous ions, this constituting the anodic reaction. As iron atoms undergo oxidation to ions they release electrons whose negative charge would quickly build up in the metal and prevent further anodic reaction, or corrosion. Thus this dissolution will only continue if the electrons released can pass to a site on the metal surface where a cathodic reaction is possible. At a cathodic site the electrons react with some reducible component of the electrolyte and are themselves removed from the metal. The rates of the anodic and cathodic reactions must be equivalent according to Faraday’s Laws, being determined by the total flow of electrons from anodes to cathodes which is called the “corrosion current”, Icor. Since the corrosion current must also flow through the electrolyte by ionic conduction the conductivity of the electrolyte will influence the way in which corrosion cells operate. The corroding piece of metal is described as a “mixed electrode” since simultaneous anodic and cathodic reactions are proceeding on its surface. The mixed electrode is a complete electrochemical cell on one metal surface.
The most common and important electrochemical reactions in the corrosion of iron are thus
Anodic reaction (corrosion)
(1) Fe —> Fe2+ + 2e
Cathodic reactions (simplified)
(2a) 2H+ + 2e —> H
or
(2b) H2O + ˝O2 + 2e —> 2OH-
Reaction 2a is most common in acids and in the pH range 6.5 — 8.5 the most important reaction is oxygen reduction 2b. In this latter case corrosion is usually accompanied by the formation of solid corrosion debris from the reaction between the anodic and cathodic products.
Fe2+ + 2OH- —> Fe(OH)2, iron (II) hydroxide
Pure iron (II) hydroxide is white but the material initially produced by corrosion is usually a greenish color due to partial oxidation in air.
2Fe(OH)2 + H20 + ˝O2 —> 2Fe(OH)3, hydrated iron (Ill) oxide
Further hydration and oxidation reactions can occur and the reddish rust that eventually forms is a complex mixture whose exact constitution will depend on other trace elements which are present. Because the rust is precipitated as a result of secondary reactions it is porous and absorbent and tends to act as a sort of harmful poultice which encourages further corrosion. For other metals or different environments different types of anodic and cathodic reactions may occur. If solid corrosion products are produced directly on the surface as the first result of anodic oxidation these may provide a highly protective surface film which retards further corrosion, the surface is then said to be “passive”. An example of such a process would be the production of an oxide film on iron in water, a reaction which is encouraged by oxidizing conditions or elevated temperatures.
2Fe + 3H20 —> Fe2O3 + 6H+ + 6e
http://www.npl.co.uk/upload/pdf/the_...th_figures.pdf
Go to page 3:
Anode and cathode..... Where have you heard that terminology before? Why DC batteries and circuits, of course.INTRODUCTION
<snip>
In electrochemical terminology, an electrode at which an oxidation reaction occurs is called an anode. The process of oxidation involves a loss of electrons by the reacting species, as occurs in the metal dissolution reaction (1). Thus an area of a corroding metal where metal dissolution occurs is an anode and metal dissolution is the anodic reaction of corrosion. An electrode at which a reduction reaction occurs is called a cathode. Reduction involves a gain in electrons, as occurs in reactions (4) and (6). The reduction of hydrogen ions and oxygen are thus the cathodic reactions of corrosion and the area of a corroding metal Where these reactions occur is a cathode.
The actual degredation of metal by corrosion is always and everywhere a form of electrolysis.
Last edited by 10x25mm; 06-24-2018 at 12:37 AM.
Now let's deal with the second of your two original criticisms, bacteria:
Download Lecture 24 of the NPTEL distance learning course Advances in Corrosion Engineering. I selected the National Programme on Technology Enhanced Learning course from the prestigious Indian Institutes of Technology because it directly addresses aerobic bacterial corrosion of steel, among other metals:
http://nptel.ac.in/courses/113108051.../lecture24.pdf
Here you are interested in aerobic (not anaerobic) MIC. The anaerobic SRB MIC is what you have encountered in petroleum vessels. Anaerobic MIC gets a lot more attention, but aerobic MIC is both real and far more common. The most common aerobic bacteria triggering MIC on steel are acidithiobacillus thiooxidans and acidithiobacillus ferrooxidans. 'ferro', get it?Introduction
Microbially-influenced corrosion (MIC) occurs in environments such as soil, fresh water and sea water and accounts for more than 30 percent of all corrosion damage of metals, alloys and several building materials. Microorganisms of interest in MIC belong to many types such as sulfur-sulfide oxidising, sulfate-reducing, iron oxidizing, acid producing, manganese fixing and ammonia and acetate producing bacteria and fungi. The role of Sulphate Reducing Bacteria (SRB) in MIC has been extensively studied. Microbial activities under natural conditions influence many electrochemical reactions directly or indirectly. Microbe-metal interactions involve initial adhesion, biofilm formation and colonization, generation of polymeric substances and inorganic precipitates and subsequent corrosion.
The bacteria mostly create the reagents which trigger the electrolysis corrosion noted above, rather than directly attack the steel. There are some aerobic bacteria which directly attack steel, but they are killed off by UV light and are only an issue in underground operations such as mining.
Do you need any further references?
Last edited by 10x25mm; 06-24-2018 at 12:35 AM.
Here is a very extensive test done on this with most all lubes and tons of pictures.
http://www.dayattherange.com/?page_id=3667
Last edited by dirtmcgirt76239; 06-24-2018 at 07:30 PM.
Cerakote!
All my blued 1911s get a light coat of this- especially since they go into leather IWB holsters.
Government's view of the economy could be summed up in a few short phrases: If it moves, tax it. If it keeps moving, regulate it. And if it stops moving, subsidize it. Ronald Reagan
Gotta be somebody need some killin
Major Benson Winifred Payne
The only blued gun I really use is my Ithaca 37 and I hunt the hell out of it all fall/winter in rain/snow... whatever. It never rusts, so I don't know what magic they used, but I just clean it like I do all my other guns with Hoppe's #9. I don't even use the oil, just the cleaner. Thing looks amazing.