|
S |
M |
T |
W |
T |
F |
S |
|
|
|
|
|
|
|
1
|
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
|
30
|
|
|
|
|
|
|
|
|
1 members (Chuck H),
268
guests, and
4
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
Forums10
Topics39,561
Posts562,809
Members14,597
| |
Most Online9,918
Jul 28th, 2025
|
|
|
|
Joined: Mar 2009
Posts: 2,072 Likes: 72
Sidelock
|
OP
Sidelock
Joined: Mar 2009
Posts: 2,072 Likes: 72 |
Is pitting pregressive, once it starts it just continues?
In a belgium 20ga SxS I am looking at I can see some pitting roughly 9 inches from the breech.
Michael Dittamo
Topeka, KS
|
|
|
|
|
Joined: Mar 2002
Posts: 2,857 Likes: 385
Sidelock
|
|
Sidelock
Joined: Mar 2002
Posts: 2,857 Likes: 385 |
|
|
|
|
|
Joined: Feb 2002
Posts: 2,859
Sidelock
|
|
Sidelock
Joined: Feb 2002
Posts: 2,859 |
That's odd, when I look at the surface of my rust-blued gun barrels under magnification I can see that they are covered with billions of tiny pits. Are you saying that my gun has skin cancer? Steve
Approach life like you do a yellow light - RUN IT! (Gail T.)
|
|
|
|
|
Joined: Feb 2006
Posts: 3,854 Likes: 118
Sidelock
|
|
Sidelock
Joined: Feb 2006
Posts: 3,854 Likes: 118 |
The pits were caused by the corrosive powder in the primers, some to the black powder and the rest to moisture, and the biggest of not being cleaned after shooting.
With the chemicals used today for cleaning bores, I would say the pitting is arrested as there is no moisture or other agent to further cause the pitting to continue.
David
|
|
|
|
|
Joined: Jan 2002
Posts: 5,954 Likes: 12
Sidelock
|
|
Sidelock
Joined: Jan 2002
Posts: 5,954 Likes: 12 |
+1 JDW
If the corroded metal is removed from the pit, fully removed, and the metal is kept protected, there will be no further deepening or widening of the pit. If corroced metal is left in the pit, it becomes a trap for moisture and any corrosive material left in during cleaning. Modern cleaning chemicals, as mentioned above, make clearing pits to the sides and bottom much easier than in older times.
DDA
|
|
|
|
|
Joined: Mar 2009
Posts: 2,072 Likes: 72
Sidelock
|
|
OP
Sidelock
Joined: Mar 2009
Posts: 2,072 Likes: 72 |
Was polishing out the pit how the corroded metal was removed on the past?
Michael Dittamo
Topeka, KS
|
|
|
|
|
Joined: Jul 2012
Posts: 4,946 Likes: 345
Sidelock
|
|
Sidelock
Joined: Jul 2012
Posts: 4,946 Likes: 345 |
Rockdoc,
The "billions of pits" in the surface of rustblued barrels, are the result of the bluing solution.The rusting is killed by boiling and the color is changed to black at the same time.It is actually these pits that give rustblue it's famed wear resistance( wear would have to reach the bottom of the pits).This "pitting"("biting")is also the reason that polishing with finer than worn 320 grit abrasive is futile.
Mike
|
|
|
|
|
Joined: Dec 2001
Posts: 3,553
Sidelock
|
|
Sidelock
Joined: Dec 2001
Posts: 3,553 |
Der Ami,
Not joking here, but as boiling in water kills rust, would anything be gained in a pitted bbl by a few boiling water bath/bore brush in a drill cycles?
The pits would be blued then perhaps?
Just wondered if the boiling thing is ever done to arrest inside bbl rust?
Franc
|
|
|
|
|
