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  1. ugwuegbuchima

    Risk of seawater corrosion to the bolt hole and screw?

    Like boo1 rightly said,sealants provide the best method of protecting the bolt holes against corrosion.Sealants makes water impermeable to the bolt holes thus preventing water from entering the bolt holes.Sealants can be inform of gaskets etc.Care must be taken while slecting sealants to be used...
  2. ugwuegbuchima

    Inspection Method

    Hope you mean porosity in carbon steel and not pourisity because I don’t think any thing like that exist in carbon steel. If you mean porosity in carbon steel, the following tests can be carried out to determine porosity in carbon steel. (1) Ultrasonic Testing: a non destructive test that...
  3. ugwuegbuchima

    Black Zirconia

    I believe injection moulding is used mainly for thermoplastic moulding process. How It Works The powder to be used is filled into the hopper of the injection moulding machine.It is then pushed forward by a ram in the machine to the heating cylinder of the injection moulding machine,where...
  4. ugwuegbuchima

    Maximum Allowable Load

    In continuation, P= A.Ss where P is the allowable load you are looking for,A= cross-sectional area of the material and Ss the allowable stress on the material which you must know before you can be able to get P.I believe you can be able to calculate the area and get it on your own.
  5. ugwuegbuchima

    Maximum Allowable Load

    I believe if you know the maximum amount of stress(internal force) that is to act on the U-shaped bar and also the area of the bar,you can be able to calculate the max. allowable load for the material. That is since Ss= P/A where Ss is the max. allowable stress on the material,P=...
  6. ugwuegbuchima

    Al2O3: Relationship between grain size and density?

    Question(1) From what I know about firing of a ceramic body, there is a relationship between fired density and initial particle/grain size of the ceramic body. The initial particle/grain size will determine whether or not the fired density of the ceramic body will...
  7. ugwuegbuchima

    ASTM Equivalent to DIN 1691 GG25...

    ASTM E 9 might also be correct.
  8. ugwuegbuchima

    ASTM Equivalent to DIN 1691 GG25...

    ASTM equivalent of DIN 1691 GG25 is ASTM A 536 standard.I got the answer through a search engine(google).
  9. ugwuegbuchima

    Corrosion detection in aluminium alloy

    NDT.net - November 1998, Vol. 3 No. 11 Table of Contents ECNDT '98 Session: Pipeline Industry Ultrasonic Inspection of Risers a New and Simple Approach R. van Agthoven Röntgen Technische Dienst bv P.O. Box 10065, 3004 AB Rotterdam, The Netherlands telephone +31 10 2088208, fax +31 10 4158022...
  10. ugwuegbuchima

    DIN/ASTM Material Equivalence

    Please try this web address and see whether you will be able to get what you are looking for.(http://www.astm.org/).
  11. ugwuegbuchima

    Dissimilar metals

    It is not wise to use dissimilar metals for a design in a high salinity condition(where NaCl is present).Their contact results to galvanic corrosion.In a situation were dissimilar metals are unavoidable(since you are considering your budget),the metal forming the anode should not have small...
  12. ugwuegbuchima

    air compressor sizing

    Just want to give you the other volumes and air compressor size needed for the volumes. (A) For (40-60) cfm vol. At 100psi,use (10-15)Hp air compressor. (b) For (60 –81)cfm vol. At 100psi,use 18Hp air compressor size. (c) For (81-137)cfm vol. At...
  13. ugwuegbuchima

    air compressor sizing

    Air compressor sizing depend on the vol. of air which the compressor can disperse(cfm)and the pressure at which the air is being dispersed(psi).Since you have gotten the required vol. for your job,I believe you don't have much problem as regards to compressor size. 1. If your vol. is within the...

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