Of stainless steel basket be able to bear or endure corrode function evaluation

Of hardware storage rack be able to bear or endure corrode function evaluation

A kind of stainless steel can be had in a lot of medium be able to bear or endure goodly corrode sex, but be in some kind of medium is additionally medium, however because the likelihood is chemical stability is low and happen corrode. Say so, a kind of stainless steel is able to bear or endure impossibly to all medium corrode. In numerous industrial utility, stainless steel can be offerred today the person is able to bear or endure approvingly corrode function. In light of the experience that the basis uses, outside removing mechanical be no longer in force, of stainless steel corrode main show to be in: A kind of stainless steel corroding a form badly is isolated corrosion (i.e. stress is corroded corrode between craze, spot corrosion, brilliant, corrode exhaustion and crevice corrosion) . The invalidation example that these isolated corrosion place bring about occupies the half above of invalidation example almost. In fact, accident of a lot of invalidation is OK carry reasonable select material and give avoid.

Of the metal corrode, can divide by mechanism corrode to manage especially, chemistry is corroded corrode 3 kinds with electrochemistry. The life the project is actual, actual medium corrosion of metals, great majority belongs to electrochemistry to corrode.
Stress corrodes craze (SCC) : It is to point to bear as a result of,the alloy of stress is in in caustic environment of intense grain patulous and a kind of of each other unripe invalidation current term. Stress corrodes craze to have appearance of form of brittleness fracture surface, but it happens possibly also in the stuff with expensive tenacity. Producing stress to corrode the requirement of craze is to should have pull stress (it is leftover stress or adscititious stress no matter, both perhaps hold concurrently and have) and corrode medium specificly to exist.

Model the formation of grain and patulous roughly with play stress way perpendicular. This brings about stress to corrode the stress value of craze, the material when wanting to exist than corroding medium ruptures the stress value of a need is little much. Be in microcosmic on, the crackle that crosses grain calls the crackle that wear brilliant, and the crackle that pursues along crystal boundary enlarge calls edge brilliant crackle, corrode craze to expand when stress to one of deepness when (here, bear the stress on the material section of load achieves its fracture stress in air) , criterion material presses normal crackle (in tenacity material, it is to pass normally microscopical the polymerization of blemish) and disconnect. Accordingly, corrode craze as a result of stress and the section of the spare parts of invalidation, of the diagnostic section that contains the bag stress to corrode craze and the aggregate photograph connection with tiny already flaw " nest of pliable but strong " area.

Spot corrosion: Spot corrosion is to point to the isolated corrosion that be not corroded for the most part in metallic stuff surface or corrodes slight and dispersive hair to give birth to height, the measure that common corrode orders is less than 1.00mm, deepness often is more than exterior aperture, light person have more shallow corrode hole, form bore a hole badly even.

Corrode between brilliant: The bound between grain is the bound city that disorder fault shuts between the grain with crystallography different orientaton, consequently, they are all sorts of solute elements in steel slant analyse or metallic compound (be like carbide and δ photograph) the advantageous area city of precipitation separate out. Accordingly, be in certain in corroding medium, the scope between grain is potential go ahead of the rest is corroded to be no wonder. Of this kind of type corrode corrode between the brilliant that be called, most metal and alloy appear possibly in corroding medium specificly corrode between brilliant. Be being corroded between brilliant is one kind has corrode optionally destroy, it and corrode different point to depend on optionally commonly, cankerous local sex is microscopical of measure, and macroscopical going up is not local certainly.

Crevice corrosion: It is the macroscopical corrode hole that shows in metallic component aperture place produces stain shape or cankerous form, it is a kind of form of isolated corrosion, it may send complete Yu Rong in fluid standstill aperture or inside the surface of screen. Such aperture can be in metal and metal or metal and metalloid joint place to form, for example, the place in as conterminous as the rivet, bolt, spacer, valve base, surface deposit that become loose and sea organisms candle is formed.

Corrode in the round: It is to use a description to be in whole alloy apparently in order to compare all the corrodes a phenomenon term that the means place of spoon produces. When happening to be corroded in the round, because corrode,the village expects and attenuate gradually, even material corrodes invalidation. Stainless steel appears possibly in strong acid and alkali to be corroded in the round. Corrode the invalidation problem that poses how to to make a person afraid in the round, because, this kind is corroded can pass simple soaking tests normally or consult the document data that corrodes a respect and forecast it.

Uniform corrosion: It is to show the contact corrodes the metallic surface of medium to produce cankerous phenomenon entirely. To be able to bear or endure according to different use situation corrode raises different index requirement, can divide commonly it is two kinds big:

1, stainless steel points to in atmosphere and the steel that corrode is able to bear or endure in corroding medium infirmly. Corrode rate to be less than 0.01mm/ year, consider as " be able to bear or endure completely corrode " ; Corrode rate to be less than 0.1mm/ year, consider as " be able to bear or endure corrode " .

2, corrosion-resisting steel points to the steel in corrode of all sorts of the ability in corroding medium strongly.

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