Common welding related questions we hear. Part 7

More so now than in the past, there is renewed interest in DC TIG welding of aluminum. Without a doubt, a quick online search will yield dozens of forum threads, and videos documenting this practice. You’ll see both DC negative and DC positive used, and with highly variable results. Is it possible to weld with DC? Yes, of course. Early forms of TIG welding before HF stabilized AC current was used, employed DC only welding.

Airplanes in World War II were often pieced together with DC TIG. In these days Helium was the preferred and readily available gas. These days, Helium has fallen out of favor, making Argon king. However, Argon does not have the same properties as Helium, which helped in penetration and cleaning of the aluminum while welding. Helium is also much more expensive, which has curtailed its use. But you can buy some Argon/Helium gas blends which restore much of what was lost with pure Argon.

DC positive polarity works well, for cleaning and welding on oxidized aluminum material, reducing the need to clean, but it requires huge diameter tungsten electrodes along with high amperage to weld even the thinnest material because the direction of the electron flow concentrates the heat on the Tungsten rather than the work. In DC negative, you have to have perfectly clean metal, free from oxidation and impurities. Coupled with a high percentage of Helium, you can find that that a passable job can be done. However, it does take lots of patience and skill to get this done right.

If you are not careful, you’ll have a thick crusty scum on top of the aluminum while welding that does not seem to want to flow or even weld and eventually you’ll have a huge molten lake of aluminum that forms right under the surface of the scum…and a huge blowout. In either case whether you use DC+ or DC-, you are going to have to be on top of your game and pull together your best skills to be able to competently complete a weld. Arc stability suffers somewhat as well with these processes as the arc will want to wander around.


Here in this post, it is given many queries    visit the site    and answers regarding the weldi9ng works. I think this will be very much helpful for those who studying or working under mechanical fields especially the welding workers.Thank you for sharing this 

Thanks for all the information that was posted here. It was very helpful for many people and for me too, I made a huge progress with my Japanese project ロイヤルベガスカジノ with your help. Thank you very much! どうもありがとうございました!

Harry Potter is the best, i really like Daniel Radcliffe because he acts very well. Andy Khawaja

I think other web site proprietors should take this web site as an model, very clean and great user friendly style and design, let alone the content. You’re an expert in this topic!

seo backlinks uk


irritable bowel is really bad, this disease can really crap your digestive system~ Bet365 bih

Comfortabl y, the post is actually the freshest on this precious topic. I concur with your conclusions and also definitely will eagerly look forward to your future updates. Saying thanks definitely will not simply just be acceptable, for the fantastic lucidity in your writing. I definitely will instantly grab your rss feed to stay abreast of any updates. Fabulous work and also much success in your business endeavors! amber park

Aw, it was an extremely good post. In notion I must place in writing such as this moreover – spending time and actual effort to make a really good article… but so what can I say… I procrastinate alot and no means apparently go completed. treasure at tampines floor plan

Hey – good weblog, simply wanting around some blogs, seems a reasonably nice platform You Are using. I’m currently using Drupal for a couple of of my websites however seeking to change one among them over to a platform very a lot the identical to yours as a trial run. Anything particularly you’d advocate about it? avocat sortie indivision

There a few fascinating points in time in this posting but I don’t determine if I see these people center to heart. There exists some validity but I’ll take hold opinion until I look into it further. Great article , thanks and now we want far more! Added to FeedBurner in addition Parc Central Residences EC

Great written content and great layout. Your blog deserves all the positive feedback it has been getting. is ecomhunt worth it

Aw, i thought this was a very good post. In thought I must set up writing like that additionally – taking time and actual effort to generate a excellent article… but so what can I say… I procrastinate alot and also by no means often get something carried out.

If you borrow money online you can expect to receive anything between a $100 and $1500. 借錢網

clay garden pots are great but if you want a cheaper alternative, you can always use those plastic garden pots` Rishta in Pakistan

cheers for such a great blog. Where else could anyone get that kind of info written in such a perfect way? I have a presentation that I am presently working on, and I have been on the look out for such information. instagram marketing tools

I randomly browse blogs on the web, and that i discover your article to be very informational. I even have already bookmark it on my browser, so as that I can view your blog publish another time later. Additionally, i am wondering whether or not your weblog is open for link exchange, as i really wish to trade links with you. I do not normally do that, but I hope that we will have a mutual hyperlink exchange. Let me understand and have an ideal day!

Betting is the process where you need to invest some real money, so you need to be clear without any confusion when you are betting.   satta king

eating can be considered my hobby he he he. i would really love to visit foods blogs and see some recipes:: botox before and after

i would alway prefer hotel rooms with flannel sheets and cotton beddings, i love the feel of those fabric’ amber park

Thanks a lot for your energy to have had these things together on this site. Robin and that i very much liked your knowledge through the articles about certain things. I know that you have several demands on your program so the fact that you actually took just as much time just like you did to guide people just like us by means of this article is definitely highly liked. treasure at tampines floor plan

Thanks for the suggestions you have provided here. Another thing I would like to state is that personal computer memory demands generally increase along with other innovations in the technology. For instance, if new generations of processor chips are brought to the market, there is usually a matching increase in the scale preferences of all laptop or computer memory in addition to hard drive space. This is because the software operated by simply these cpus will inevitably surge in power to use the new technology. leptitox reviews

Thank you for any other great article. The place else may just anyone get that type of information in such a perfect method of writing? I’ve a presentation next week, and I’m at the look for such info. locksmith

It is not logical to think you can hire someone for little to no money and get the same results you would get if you had spent twice what you paid.   fotógrafo de bodas en sevilla

Sims Villa Condo by Hong Leong & CDL. Hotline 61009266. Get Discounts, Direct Developer Price, Brochure, Floor Plan, Price List & More. Sims Villa

Hyll on Holland by FEC. Hotline 61009266. Get Discounts, Direct Developer Price, Brochure, Floor Plan, Price List and More. Former Hollandia & Estoril Singapore Hyll on Holland

The M by Wing Tai. Hotline 61009266. Get Discounts, Direct Developer Price, Brochure, Floor Plan, Price List and More. The M Condo

Penrose by CDL & Hong Leong. Hotline 61009266. Get Discounts, Direct Developer Price, Brochure, Floor Plan, Price List and More. Penrose Condo @ Sims Drive Penrose Condo

Ki Residences by CDL & Hoi Hup & Sunway. Hotline 61009266. Get Discounts, Direct Developer Price, Brochure, Floor Plan, Price List and More. Ki Residences @ Sunset Way. Ki Residences

Forett At Bukit Timah by QingJian. Hotline 61009266. Get Discounts, Direct Developer Price, Brochure, Floor Plan, Price List and More. Former GoodLuck Garden. Forett At Bukit Timah

Do people still use these? Personally I love gadgets but I do prefer something a bit more up to date. Still, nicely written piece thanks. Penrose showflat

This really is such a awesome write-up. I’ve been looking for this information for quite a while now and then finally stumbled upon your internet site. Thanks so much for posting this, this has helped me out tremendously. By the way I love the style of the blog, looks good, did you create it all by yourself? One Pearl Bank Price

Thanks - Enjoyed this post, can you make it so I receive an email when you make a fresh post? From Online Shopping Greek The Linq at Beauty World

Hey, are you having issues with your hosting? I needed to refresh the page about million times to get the page to load. Just saying Hyll On Holland

The the next time I read a weblog, I hope that this doesnt disappoint me up to this one. I am talking about, I know it was my substitute for read, but I just thought youd have something intriguing to state. All I hear is usually a few whining about something that you could fix should you werent too busy seeking attention. Clavon Condo

The reason that online slot machines can offer such large payouts is only because they generate millions of combinations so the chances of hitting jackpots are low. slot game online indonesia

To make sure they are legit, first check their offered table limits as well as their high roller casinos betting limits, particularly for the games that interest you.   afc168