SS Pin Wet Tumble users, How do you deal with pinging?

[Joe R]

Ok, I've read the Galvanic corrosion article. And I've also dealt with this problem with the valve on my water heater. The corrosion happens when two dissimilar materials are joined for long periods of time, measured in decades. It happened to me with a water heater valve where my plumber attached a copper pipe to a galvanized nipple. The water heater was installed in 1995 and I noticed the corrosion in March and had it taken care of it.

Copper and brass are similar enough materials that this process would be even slower than that. This argument is IMO purely academic from a reloading/competition standpoint.

suberjc said: Good job with the match BTW.

Thank you, for the kind words, they are much appreciated.

Joe

 

[Joe Salt]

Sorry all you guys haven't tried cleaning the insides of your necks then us molly to coat the inside so you don't have that problem. Bullets even seat more consistent.

Joe salt

 

[bigedp51]

Please educate me, I am an eager student?

Kindest regards,

Joe

Joe I'll tell you exactly what our military instructors told us when we asked what causes this reaction to happen.

Military Instructor: "It happens because the queer electrons keep changing polarity and keep jumping the other atoms".

Which is much easier for a 18 year old to grasp when all he thinks about is going to the enlisted mens club and jumping anything wearing a skirt than the scientific explanation below.

"Since oxidation involves loss of electrons and reduction involves gain of electrons, it is evident that if one substance loses electrons, another substance at the same time must gain electrons because electrons cannot be the products in any chemical change. This means that in any process, oxidation can occur only if reduction is also taking place side by side and vice versa. Thus, neither oxidation, nor reduction can occur alone. Both the processes are complementary like give and take and proceed simultaneously. That is why chemical reactions involving reduction-oxidation are called redox reactions. In fact, during the redox reaction there is a transference of electrons from the reducing agent to the oxidising agent as shown below:

For example, consider a reaction between zinc and copper ions.

In this reaction zinc atoms lose electrons and are oxidised to zinc ions (Zn2+) whereas cupric ions (Cu2+) gain electrons and are reduced to copper atoms. Thus, cupric ions act as oxidising agent and zinc atoms act as reducing agent. In fact the oxidising agent gets reduced while reducing agent gets oxidised during the redox reactions."

 

[CPorter]

First of all I'm not a chemist and the classes were decades ago. The copper zinc thing still doesn't really show a likely bond between them. Copper has oxidation states of +1, +2,+3,+4 with 2 being most common, Zinc has states of +1, +2, and 0. Both of these are wanting to give up electrons to form a stable outer shell. Carbon has oxidation states from 4 to -4 and would be more likely to pick up free electrons from both copper and zinc to form a bond.
Joe R, carbon has multiple forms. The bad ones for us are cubic bonds, like a diamond. Graphite is a form of carbon that exists in hexagonal plates. These plates slide easily over each other which is why graphite, molybdenum disulphide (moly), tungsten disulphide and hexagonal born nitride are used as lubricants. Several people advocate pretreating the barrel after cleaning with Lock-ease for those that shoot naked bullets or whatever lubricant you are using on the bullets. I do it and I have proved to myself that it helps bring the first shots into the same POI a fouled barrel will have.