Wiki: Acid

Tabby · 2010-08-12T22:00:24+00:00

Feedback welcome...NT==Precautions==Most acids are high risk chemicals. Several precautions are advisablewith the stronger acids. These don't all apply to vinegar & citricacid.* When diluting, never add water to acid, always add acid to water.Doing so is sometimes highly exothermic, and should be done a bit at atime, wearing safety specs. If done the wrong way the result can evenprogress to explosion sometimes. Exploding boiling acid is not anessential nutrient.* The stronger acids used in DIY can eat through skin rapidly. Wearsuitable gloves* When holding hold the bottle by the label area, so any unnoticedruns are on the same side, and that's not where you're holding it.* Don't mix acid with bleach, the resulting chlorine is quite toxic.* Don't mix acid with alkalis, excess heat is generated, and boilingspitting acid isn't usually a good thing.* Strong acid plus metal can generate hydrogen, which is explosive atabove 4% concentration.* Suitable gloves & eye protection are sensible for the strongeracids.* In case of skin contact with strong acids, wash for 10 minutes tominimise burning, chemical reaction & contamination. In case of eyecontact, wash well and seek medical help promptly.==Hydrochloric Acid==[[image:HCl 34% |right|200px]]* The strongest of all the acids used in DIY* Also known as spirits of salt, muriatic acidUses* Eats cement & lime* Cleans cement off bricks etc - but not off cement products* Can also be used to descale ceramics, but can discolour otherwiseunnoticeable surface cracking18% hydrochoric acid is used industrially to clean steel beforecoating ('pickling'). Spent pickling solution is sometimes then usedas ferrous chloride.Risks* Destroys cement joints in ceramic pipes* Strong HCl produces choking fumes and mist* HCl is highly corrosive to skin, eyes, lungs etc, and toxic.Inhalation of ttoo much of the fumes can cause death* In case of skin contact, wash for 10-15 minutes. In case of eyecontact, wash for 10-15 minutes, lifting both upper &...

Wiki: Acid

Aug 12, 2010 63 Replies

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Andrew Mawson 15 years ago

Firstly you may have problems getting a Stihl dealer to sell you anything without a Chain Saw certificate. I have a Stihl 023 which I've had for years (14" bar) and have in the last year bought a couple of Stihl 038 Farmbosses on ebay (18" bar). I like to have a carry bag for the chain saws so everything stays together - a Stihl dealer refused to sell me a bag without a certificate!!! Incidentally I have legitimate grandfather rights to use one. Stihl saws are great - very reliable, spares easily available and relatively easy to fix if things go wrong. One of the 038s was a wreck, and I replaced the piston/ cylinder/oil pump , some anti vibration mounts and chain the catcher and now it's a fantastic machine.

AWEM

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Andy Dingley 15 years ago

IMHE, you've got more trouble in buying one without getting the half- hour lecture about how Stihl won't let them sell on-line, so now they're losing that market to grey market resellers who don't care about it. Stihl haven't stopped on-line sales, but they've certainly alienated their dealers over this.

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Grimly Curmudgeon 15 years ago

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember "Andrew Mawson" saying something like:

Fcking ridiculous carry-on, iyam. When did that come in?

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Andy Dingley 15 years ago

No such requirement. There is (quite rightly) a restriction on top- handle chainsaws (really only to be used at height anyway) and you need to have a certificate of competence before buying one of those.

You may of course find a dealer that won't sell without a chit, but that's just up to them.

Personally I'd support a certificate requirement for chainsaw bars without a tip protector (anti kickback), including electrics.

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