Volvo Penta Neutra salt additive

[Lynall]

I have replied to another post and its rightly been pointed out that it not much to do with ops original post, so thought i would start a new one:joyous:
All bolts were M8x50 apart from the last two, i ground a small chunk of the end of each one so bare steel was exposed.
All additives were mixed at roughly 20ml to 100 ml sea water taken from where my boat is moored
1st pic, bolts left to right, Neutra salt, std glycol anti freeze, 100% sea water, salt away, i cant find the rest of my sticky label to tell you what the last two bolts were immersed in!
2nd pic sludge left in bottom of neutra salt jar, all other jars were pretty much spotless as was the glycol botl you can see in the bottom of the pic
The neutra salt and the salt away both ate away the bolts zinc coating over the first few days, you can see this happening in the youtube video at the bottom of this post
Certainly makes you think!





Salt Away reaction to a zinc coated mild steel bolt, neutra salt test - YouTube
Lynall

 

[Lynall]

Re: Volvo Penta Neutra salt additive

More pics
Jam jar pic you can see the colour of the water/additive mix, the 4th jam jar in you can see dated Jan 2013, the rest were all Oct 2012
Second pic better pic of bolts
Neutra additive cost in the uk is 60 gbp for 4 litres, wonder how much it is in the USA?

 

[DCinVA]

Re: Volvo Penta Neutra salt additive

Let me prefix this post by saying that I have never heard of Salt Away, and know nothing about it.

My first reaction to your post was wow. And my conclusion, without thinking about it was that salt away does not do what it is supposed to do.
But after thinking about it a bit, I am not sure my initial conclusion was correct. First, hopefully everyone is using stainless hardware, as this is just the smart thing to do for a marine application. Second manifolds, risers, and your block and heads are made from cast iron, and not zinc plated. The only thing in the cooling system made of zinc are your "zincs".

So the only conclusion I can derive from your post is that salt away has some sort of chemical reaction with your zincs, and perhaps that is what is supposed to happen?
Would it not be better to test salt away with the material that your block and manifolds are made from? After all this is what the product is supposed to protect.

Not trying to be negative, and clearly your post has inspired me to give this some thought. Hopefully others will chime in and share their thoughts as well.

Respectfully
Dave

 

[Lynall]

Re: Volvo Penta Neutra salt additive

Do you know Dave, I never actually gave it any thought, I just assumed ferrous metal was er ferrous metal!
But on that point i will have a look around for some cast iron or is it cast steel?
Always good to have other peoples views as you rightly say it makes you think.


Lynall