Who knows anything about stainless steel pacification ?

Question

welded ends for sanitary piping, and for welded parts on s.s.tanks.
how might I get certified to do this type of work ?

Answer 1

*Passivation is "the removal of free iron particles or iron compounds from the stainless steel surface by means of a chemical dissolution, most typically by a treatment with an acid solution that will remove the surface contamination."

In lay terms, the passivation process removes "free iron" contamination left behind on the surface of the stainless steel from machining and fabricating. These contaminants are potential corrosion sites that result in premature corrosion and ultimately result in deterioration of the component if not removed. In addition, the passivation process facilitates the formation of a thin, transparent oxide film that protects the stainless steel from selective oxidation (corrosion).

*PASSIVATE: SPECIFICATIONS:

HP4-8 : MIL-F-14072 /P-6402 /AMS-QQ-P 35.
HS-178 : MIL-S-5002/ P4D-E /QQ-P-35.
KPP-1006: MIL-STD-171 /P-6401 /SS-8435.
KPS-211 : MIL-STD-753 /ASTM A380.
ASTM A 967 : MIS-20134 /PS700 TY VII.

*ASTM A967-01e1
Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
ASTM International / 10-Oct-2001 / 6 pages
REPLACED by ASTM A967-05
*1.1 This specification covers several different types of chemical passivation treatments for stainless steel parts. It includes recommendations and precautions for descaling, cleaning, and passivation of stainless steel parts. It includes several alternative tests, with acceptance criteria, for confirmation of effectiveness of such treatments for stainless steel parts.

1.2 Practices for the mechanical and chemical treatments of stainless steel surfaces are discussed more thoroughly in Practice A 380.

1.3 Several alternative chemical treatments are defined for passivation of stainless steel parts. gives some nonmandatory information and provides some general guidelines regarding the selection of passivation treatment appropriate to particular grades of stainless steel but makes no recommendations regarding the suitability of any grade, treatment, and acceptance criteria for any particular application or class of applications.

1.4 The tests in this specification are intended to confirm the effectiveness of passivation, particularly with regard to the removal of free iron and other exogenous matter. These tests include the following practices:

1.4.1 Practice A - Water Immersion Test,

1.4.2 Practice B - High Humidity Test,

1.4.3 Practice C - Salt Spray Test,

1.4.4 Practice D - Copper Sulfate Test,

1.4.5 Practice E - Potassium Ferricyanide-Nitric Acid Test, and

1.4.6 Practice F - Free Iron Test.

1.5 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.

1.6 The following precautionary caveat pertains only to the test method portions, Sections 14 through 18 of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Answer 2

Sure, now close your eyes and pretend like Windows has never existed. Lose any expectations it will be Like Windows. It has a lot of software that is available for a user to install and there are many options for what you will want to use. Mint Linux is highly recommended for some one new to Linux because it has the files installed a user would need to get started right away. And second it is based on Ubuntu, so if you decide to go with just Ubuntu the transition is fairly easy. Linux over the years has come a long ways to become more user friendly. Ubuntu is a distribution that is based off of Debian Linux Source files. You can run most Linux distributions from the LiveCD without install it. They run in RAM Memory and don't touch the hard drive or the operating system on the computer. It was done this way so people can try it out before they ever decide to install it to the hard drive.

Answer 3

Pacified Definition