The element with stainless steel rusty finished product

In everyday life, we can discover sometimes, the stainless steel chopstick in the kitchen is worn or dish of stainless steel tool carrier, stainless steel bowl is worn etc, rusted unexpectedly. "Be of stainless steel? How is the meeting rusty? " a lot of people gave out such doubt. To this, jiangsu Dong Gang with a major person the capacity will answer for us doubt dispels doubts, discuss the detailed factor with rusty stainless steel in detail:
Normally the circumstance falls, we should view the stainless steel that is what raw material in detail above all, 304 not bad, but if be 201, 202 rust simply with respect to contrast. And be below sure condition, stainless steel also is can rusty.

Stainless steel does not become rusty, basically be to rely on its appearance to form a paper-thin and consolidate close stable Fu Ge oxidizes film (defend film) , avoid oxygen atomic to continue to enter, continue to oxidize, and obtain fight rustily ability. Once have some kind of factor, this kind of film sufferred damage ceaselessly, atom of the oxygen in air or liquid can be entered ceaselessly or the iron in the metal is atomic ceaselessly analyse leaves come out, form loose ferric oxide, metallic appearance also suffers ceaselessly rustily. The method that this kind of outside film damages a lot of, there are a few kinds commonly as follows in everyday life:

Appearance of 1. stainless steel retains the attachment that accumulating the dust that contains a lot ofother tantalum or alien metal grain, in humid air, the condenser water between attachment and stainless steel, become both a small cell repeatedly, caused electrochemistry echo, diaphragm suffers damage, say call electrochemistry is corroded.

Conglutinate of appearance of 2. stainless steel has machine content juice (the dish that be like melon, water in which noodles have been boiled, phlegmy etc) , below circumstance of oxygen having water, make organic acid, long-term an organic acid is outside to the metal corrode.

Conglutinate of appearance of 3. stainless steel contains a lot ofacerbity, alkaline, salt kind material (if decorate splash of the buck of metope, limewater) , bring about a part to corrode.

4. is in the air that has pollution (if contain a lot ofthe air of nitrogen of carbon of a lot of sulfide, oxidation, oxidation) , treat condenser water, make point of fluid of vitriolic, nitric acid, acetic acid, bring about chemistry to corrode.

So, when we select finished product of stainless steel wire at the beginning, sure the goods that should choose to have credit manufacturer, also want to often undertake cleaning wiping to appearance of stainless steel finished product usually, take out attachment, such ability are useful prevent stainless steel commodity to rust.

The heat treatment method of stainless steel wire basically has dissolve of solid leaving a line and online solid dissolve 2 kinds. Dissolve of solid leaving a line is package of epigenesis of wire make friends has solution treatment into heat treatment furnace, wire function can accuse dimensions bigger, but wire requirement is new heat, dissolve of online solid of dynamical loss big; is produce in stainless steel set on the line warm up device of article heat preservation, the more than heat after use wire make friends undertakes drill accusing to cool to its, in dissolve of solid of the be over inside shorter time and recrystallization process. With the wire that this kind of method produces, the function is even, but equipment is contributive bigger.

Machine sclerotic rate to treat capable person of rubiginous steel wire low, plasticity is good, cold working magnetism is small. Wire of austenite stainless steel and board, the cold working that the differentia that wait is in canal, strip to carry older rate at wanting, its are used at candied floss when, rate of sclerosis of request wire treatment is low, central anneal little; is used at producing when fastener, should assure cold Dui not when craze; is used at welding rod and other finished product, also request sure cold working sex. Had been illogical reasonable adjust the elemental content such as C, N, Ni, Mn, Cu, increased the stability of austenite, improved the cold working sex of wire.