Saturday, January 18, 2014

The Bronze Fish

Metal is notorious for corroding in water applications.  The power packed combination of moisture, oxygen and salt, especially sodium chloride, is more deadly to metal than rust.  It corrodes or eats away at the metal by weakening it and eventually causing it to fall apart.  And if the metal is submerged in a salt water environment than count on your metal corroding five times faster than if it was in fresh water.

Considering we rely on metal in just about every "water-related" application out there, the above statistics sound a bit bleak.  Let's see, we need metal in plumbing, water filtration, sewage plants, hydro-electric power, oil & gas platform parts in the ocean, engine cooling, refrigeration, irrigation and the list goes on and on.  How could the world's economy and infrastructure have survived if metal wasn't used in water applications?  Well, since you and I haven't heard about the world's ongoing struggle to find a metal for water applications that means a solution must have been found. 

Steel in Water?

Traditionally, steel is not seen as a suitable metal for water applications.  Why?  Remember that moisture is highly corrosive to most metals including steel and zinc.  However, steel is indeed used in water applications. 

So, how do you get around the moisture problem?   OK, so here is my inner Comic Book geek coming out.  There is this character called The Green Latern.  For a visual reference see below:


The Green Latern is a unique comic book character.  He is green, flies through the air and creates objects with a special ring.  BUT what sets him apart from a lot of other Comic Book characters is his protective suit.  You see, he doesn't "suit up" like Batman or Superman.  Instead his protective suit is bonded to his DNA makeup.  So when he senses danger the suit magically appears on this skin. 

So what does Steel have to do with Green Latern's magic suit?  In order to make steel suitable for water applications, there is a process called Hot Dip Galvanizing.  This is where a "layer or protective suit" is metallurgically bonded to the steel ~ not added like Superman or Batman's suit.  This bonded layer is a complete, uniform coating that adds strength (apprx. 3600 psi) and long term durability to the part.

However before you go and select Hot Dip Galvanizing Steel (HDGS) as your "go to water metal", beware of some of the disadvantages.  You must know what type of water the part will be submerged in, such as; pure water (distilled or de-ionized water), fresh water, or seawater. Each water environment has different mechanisms that determine the ultimate corrosion rate.  For instance, studies show that HDGS will corrode up to ten times faster in a pure water environment than in a fresh water environment.

Also, one of the most corrosive areas for HDGS is in Agitated Waters, such as; wash zones and tide lines.  The agitation accelerates the corrosion rate of the zinc.  Often the “washing” motion removes the passive scales which are forming on the surfaces, exposing fresh zinc which tries to redevelop more scales/patina. This leads to rapid erosion of the zinc coating resulting in increased corrosion rates.

So what are the alternatives?

Introducing The Bronze Fish

Well by now I'm sure most of you were beginning to wonder what is this Bronze Fish all about.  After all, that's the title of the blog post.  While it's true that other metals can be used in water, there is a Bronze Alloy group that is naturally suitable for water applications.  They are chemically and mechanically designed for water (and of course other applications as well).   Hence, the Bronze Fish reference.  

This group is the Aluminum Bronzes.  

Aluminum Bronzes are most commonly used in water applications because of their great resistance to corrosion in a variety of water environments.  This makes them preferable to other engineering materials.  The Aluminum Bronze group contains a variety of choices,  but for the sake of time I will highlight three:
        1. C63000 Nickel Aluminum Bronze
        2. C95400 Aluminum Bronze
        3. C95800 Nickel Aluminum Bronze 

 

The 630 Fish - the strong & tough fish

C63000 Aluminum Bronze is an extruded or forged Wrought Alloy that contains Nickel (nominal 5%). As an aluminum bronze, C63000 has an excellent resistance to salt water corrosion and displays exceptional strength and toughness as well.  C63000 is typically used where higher mechanical properties are required.  It is used in equipment for marine applications, such as:  valve stems, high strength bushings, valve guides and seats, gears, cams, ship propellers, as well as propeller nuts and shafts.


 

 

The C95400 Fish - the popular fish

C95400 Aluminum Bronze is a Cast Product that is considered the most popular of all the Aluminum
The "Nemo' fish
Bronzes.  It is regularly stocked in a variety of shapes and sizes, such as, Solid Bar, Cored Bar and Plate and Rectangle; thus making it the "go to" Aluminum Bronze. C95400 is suitable for fresh water and salt water (if heat-treated) applications as well as agitated waters.  In fact, C95400 is nearly impervious to attack from seawater when properly heat-treated.  However note that improper heat-treatment of C95400 castings can result in a finished product susceptible to a unique form of galvanic corrosion commonly called de-aluminization.  



 

The C95800 Fish - the dirty fish

C95800 Nickel Aluminum Bronze is a Cast Product that also contains 5% Nickel (much like C63000). However, unlike C63000 it contains slightly less Aluminum & Copper and a bit more Iron. Additionally, due to it's Method of Manufacture (or the way its made) it possesses different mechanical properties. 

C95800 as a Centrifugal for pumps will stand out as being ideally suited for  saltwater, as well as brackish or dirty water, waste water and pollution control applications.  The overall corrosion / erosion resistance this alloy displays
has been deemed far superior to stainless steel -- and costs less!! (always a benefit) 


It is amazing how Bronze stands out against the "big guys", like Steel and Stainless Steel in certain environments and applications. Even though annual Bronze consumption accounts for such a small percentage of all the metal consumed in the world - it is clear that Bronze has a major part to play in the Metals Industry.  I am finding that it is a unique, diverse and adaptable underdog. 

Until next time...enjoy your week!











33 comments:

  1. I wanted to thank you for this great read!! I definitely enjoying every little bit of it I have you bookmarked to check out new stuff you post. http://tribratanewspolresrohil.com

    ReplyDelete
  2. I really enjoy simply reading all of your weblogs. Simply wanted to inform you that you have people like me who appreciate your work. Definitely a great post. Hats off to you! The information that you have provided is very helpful. black moor

    ReplyDelete
  3. Resources like the one you mentioned here will be very useful to me! I will post a link to this page on my blog. Explore photo and video images on pikdo, latest posts and popular posts about all types of fish

    ReplyDelete
  4. The ventricle is thick walled and it passes blood to the fourth part the bulbous arteriosus. From here the blood is passed to the aorta and then to the gills for oxygenation.
    lươn đồng

    ReplyDelete
  5. Above we have offered some data that you may discover incredibly helpful when setting up your first tank containing saltwater aquarium fish. Why Do Betta Fish Fight? Let’s Find Out!

    ReplyDelete
  6. We have sell some products of different custom boxes.it is very useful and very low price please visits this site thanks and please share this post with your friends. sabalo fishing

    ReplyDelete
  7. Had pleasere in reading the article thanks

    ReplyDelete
  8. If you are planning to buy used boats for sale, make sure that you decide beforehand what kind of boat you want to buy. Do not bind yourself with a boat deal unless you are not sure about the kind of boat that you want.There are different dealers and boat yards which will have a range of boats to offer. BoatsIreland

    ReplyDelete
  9. نحن نمتلك مجموعة من الخبراء والمتخصصين فى شركة تنظيف بابها ونحن نستطيع التعامل مع كافة المساحات المختلفة فلا يهم ان كنت تمتلك منزل او فيلا فأن لدينا خبرات كبيرة تمكنا من تقديم خدماتنا على اكمل وجه ولدينا عمال وفنيين محترفين ولهم خبرات مختلفة نقدم ايضآ تنظيف لواجهات الشركات والفنادق. فكل ما تحتاجه من معدات واجهزة ومنظفات ذات جودة عالمية موجودة بشركتنا فنحن نسعى فقط لارضاء العميل أولآ واخيرآ

    شركة عزل خزانات بخميس مشيط
    شركة مكافحة حشرات بخميس مشيط
    شركة غسيل مجالس بخميس مشيط
    شركة غسيل خزانات المياه بخميس مشيط
    شركة غسيل خزانات بخميس مشيط
    شركة تنظيف شقق بابها

    ReplyDelete
  10. You really should experience a tournament for starters of the best blogs on-line. I’m going to recommend this site! microfusione a cera persa

    ReplyDelete
  11. This comment has been removed by the author.

    ReplyDelete
  12. I am looking for and I love to post a comment that "The content of your post is awesome" Great work! helpusfish.com

    ReplyDelete
  13. I truly welcome this superb post that you have accommodated us. I guarantee this would be valuable for the vast majority of the general population. Food

    ReplyDelete
  14. This was a shocking post. It has some look at here fundamental data on this subject. Food

    ReplyDelete
  15. Very efficiently written information. It will be beneficial to anybody who utilizes it, including me. Keep up the good work. For sure i will check out more posts. This site seems to get a good amount of visitors. Buy Arapaima Arowana Fish

    ReplyDelete
  16. suitable reveal, you have got denoted out a few brilliant factors, I likewise suppose this s a completely suitable internet site. i will visit anew for more mood contents and also, propose this website to every single one. thank you. Poker Online Indonesia

    ReplyDelete
  17. i might following to thanks for the efforts you've got made in writing this newsletter. i am hoping the thesame fine take amusement doings from you inside the thinking of as adroitly. thank you... That Time I Got Reincarnated As A Slime Shion

    ReplyDelete
  18. This will open a window containing the HTML source code of the page. Inspect an HTML Element: Right-click on an element basic HTML CODE

    ReplyDelete
  19. URL Encoder. Enter text to URL encode or decode. Converts the text into a percent encoded string URL CODE

    ReplyDelete
  20. thanks consequently a good deal as you've got been willing to pension guidance taking into account us. we are able to always appreciate every and every and each one in all one one allowance of allocation of you have completed here because you've got made my take impact as clean as ABC. Lambingan

    ReplyDelete
  21. This will open a window containing the HTML source code of the page. Inspect an HTML Element: Right-click on an element basic HTML CODE

    ReplyDelete
  22. brilliant task here upon _______ I proper to apply a variety of weblog posts, however I never heard a topic later on this. i love this subject matter you made approximately the blogger's pail listing. Very creative. 먹튀검증 안전놀이터 스포츠중계 꽁머니 먹튀검증 토토사이트 안전놀이터 꽁머니

    ReplyDelete
  23. "From this story we were able to know about the things which are officially required at the time of making progress.
    You should be having idea about the issues that are being noticed in a while." Mem Fish How Long do Betta Fish Live

    ReplyDelete
  24. This article is not all that much. I have placed in numerous hours behind the reel looking for these steamrollers, and coming up next is a gathering of my encounters.
    tuna spreader bar

    ReplyDelete
  25. I have recently started a blog, the info you provide on this site has helped me greatly. Thanks for all of your time & work. gépszállítás Europa-Road Kft

    ReplyDelete
  26. I was looking at some of your posts on this website and I conceive this web site is really instructive! Keep putting up.. Sea Water Fish

    ReplyDelete
  27. I really got a lot of information from your site. I want to help you too.
    I hope you can visit my blog and get some good information like me.
    주소용



    ReplyDelete
  28. 다소 환상적이지만이 치료법의 조언을 확인하십시오. 토토안전업체

    ReplyDelete