CN104928665B - Containing the chromium treatment fluid stable for naked steel rusty scale - Google Patents

Abstract

It is an object of the invention to provide a kind of containing chromium treatment fluid stable for naked steel rusty scale, the percentage by weight for containing each component in chromium treatment fluid is：Sodium dichromate is 0.5~5%, NaHSO₃For 0.1~3%, FeSO₄For 0.1~2%, FeCl₃It is 0.1~1% for 0.1~2%, acetic acid, triethanolamine is 0.1~0.5%, remaining is water.The treatment fluid containing chromium has excellent antirust solution sagging performance, sprays behind the naked sample surface of weathering steel for removing iron scale, promotes the formation of stable rusty scale, and rusty scale has excellent Corrosion Protection, is adapted to the coating of naked steel.

Description

Containing the chromium treatment fluid stable for naked steel rusty scale

Technical field

The invention belongs to metal protection technical field, in particular to a kind of containing chromium treatment fluid stable for naked steel rusty scale.

Background technology

Metal erosion is a kind of failure procedure of the metal under the effect of environmental corrosion medium, is a kind of spontaneous progress completely Inevitable natural phenomena, it is the inverse process of metallurgical production.Atmospheric corrosion is to cause the early stage such as product, unit, structural member Failure and the major reason destroyed.Economic loss is extremely surprising caused by atmospheric corrosion every year.It is naked under air natural environment It is a step-by-step procedure, it is necessary to for quite a long time that steel, which forms stable protection rusty scale, at least more than 3 years, the naked steel surface shape having Into form compact and stable rusty scale time more than more than 10 years.During stable rusty scale is formed, usually there is early stage rust liquid stream and hang With the phenomenon for pollution surrounding environment of dispersing.It is directly raw and the processing of the rusty scale surface of stability is exactly that naked steel surface is chemically treated Into stable fine and close rusty scale, self-protection is formed.After coating rusty scale surface of stability inorganic agent, it can both avoid naked steel yellow using initial stage The phenomenon that color rust liquid stream is hung, prevents from polluting, and and can quickly forms stable protective rust on its surface, makes the corrosion speed of naked steel Degree tends towards stability.

The content of the invention

It is an object of the invention to provide a kind of containing chromium treatment fluid stable for naked steel rusty scale, can effectively solve naked steel rust Layer-stabilizing and rust liquid flowing down problems.

To achieve the above object, be used for the stable treatment fluid containing chromium of naked steel rusty scale designed by the present invention, its spy it is special it It is in the percentage by weight for containing each component in chromium treatment fluid is：Sodium dichromate is 0.5~5%, NaHSO₃For 0.1~ 3%th, FeSO₄For 0.1~2%, FeCl₃It is 0.1~1% for 0.1~2%, acetic acid, triethanolamine is 0.1~0.5%, remaining is Water.

It is further preferred that the percentage by weight for containing each component in chromium treatment fluid is：Sodium dichromate be 2.1~2.9%, NaHSO₃For 1.1~2.2%, FeSO₄For 0.8~1.4%, FeCl₃It is 0.3~0.8%, three ethanol for 0.7~1.5%, acetic acid Amine is 0.2~0.3%, remaining is water.

Yet further, the percentage by weight for containing each component in chromium treatment fluid is：Sodium dichromate is 2.6%, NaHSO₃ For 1.4%, FeSO₄For 1.0%, FeCl₃For 0.9%, acetic acid 0.5%, triethanolamine 0.3%, water 93.3%.

The stable mechanism of action for the treatment of fluid containing chromium of naked steel rusty scale that is used for of the present invention is：

In treatment fluid containing chromium, sodium dichromate addition promote rusty scale in alpha-feooh generation, Cr can aliquot replacement α- The stable α-(Fe of FeOOH generations_1-xCr_x) OOH, rusty scale is complete, fine and close, and tack is strong, improves the barrier propterty of rusty scale, resistance Only corrosive medium further corrodes inside steel plate.NaHSO₃、FeSO₄、FeCl₃As corrosive chemical.Cl^-It is erosion Ion, accelerate the corrosion of steel.Fe³⁺It is high valence ion, Quick Oxidation reduction reaction can occurs with base steel, generate Fe²⁺Ion. NaHSO₃With FeSO₄It can make base steel that homogeneous corrosion occur, obtain uniform rusty scale.Sulfate ion can promote the generation of alpha-feooh. Acetic acid can make base steel that extent of corrosion lighter homogeneous corrosion occur when coating, favorably obtain uniform rusty scale, can also remove base steel table The floating rust in face.Triethanolamine can form very thin coating in metal surface, completely cut off metal and O as additive₂Connect Touch, effectively prevent metal from atmospheric corrosion occurs.

Nitrite is free of using the stable treatment fluid containing chromium of naked steel rusty scale that is used for of the present invention, without intense irritation gas Taste；With excellent antirust solution sagging performance, spray behind the naked sample surface of weathering steel for removing iron scale, promote stable rusty scale Formation, rusty scale has excellent Corrosion Protection, is adapted to the coating of naked steel.

Embodiment

The treatment fluid containing chromium for being used for naked steel rusty scale stabilization of the present invention is made with reference to specific implementation example further Describe in detail.

Embodiment 1

A kind of containing chromium treatment fluid stable for naked steel rusty scale, its each component is that sodium dichromate accounts for by weight percentage 0.5%, NaHSO₃Account for 3%, FeSO₄Account for 1%, FeCl₃2% is accounted for, acetic acid accounts for 0.1%, and triethanolamine accounts for 0.5%, and water accounts for 92.9%.

Embodiment 2

A kind of containing chromium treatment fluid stable for naked steel rusty scale, its each component is that sodium dichromate accounts for by weight percentage 5%, NaHSO₃Account for 0.1%, FeSO₄Account for 0.1%, FeCl₃0.1% is accounted for, acetic acid accounts for 1%, and triethanolamine accounts for 0.1%, and water accounts for 93.6%.

Embodiment 3

A kind of containing chromium treatment fluid stable for naked steel rusty scale, its each component is that sodium dichromate accounts for by weight percentage 3%, NaHSO₃Account for 0.5%, FeSO₄Account for 2%, FeCl₃0.5% is accounted for, acetic acid accounts for 0.8%, and triethanolamine accounts for 0.4%, and water accounts for 92.8%.

Embodiment 4

A kind of containing chromium treatment fluid stable for naked steel rusty scale, its each component is that sodium dichromate accounts for by weight percentage 4%, NaHSO₃Account for 1%, FeSO₄Account for 0.5%, FeCl₃1% is accounted for, acetic acid accounts for 0.5%, and triethanolamine accounts for 0.2%, and water accounts for 92.8%.

Embodiment 5

A kind of containing chromium treatment fluid stable for naked steel rusty scale, its each component is that sodium dichromate accounts for by weight percentage 1.5%, NaHSO₃Account for 2%, FeSO₄Account for 1.5%, FeCl₃1.5% is accounted for, acetic acid accounts for 0.3%, and triethanolamine accounts for 0.3%, and water accounts for 92.9%.

Embodiment 6

A kind of containing chromium treatment fluid stable for naked steel rusty scale, its each component is that sodium dichromate is by weight percentage 2.6%th, NaHSO₃For 1.4%, FeSO₄For 1.0%, FeCl₃For 0.9%, acetic acid 0.5%, triethanolamine 0.3%, water 93.3%.

In use, raw material ratio uniform as described in each embodiment is hybridly prepared into treatment fluid containing chromium.Chromium treatment fluid will be contained Spray is on the naked sample surface of weathering steel, after natural drying, repeats to spray.

Contrast test：Using with a collection of naked sample of the weathering steel for removing iron scale, accelerate 10 days in the case where distilling water environment (often First water was sprayed every 3 hours) carry out test experiments.Wherein comparative example steel sample does not spray treatment fluid containing chromium.Coat this implementation For the naked sample of weathering steel of example treatment fluid containing chromium during accelerated corrosion, corrosion rate is the not surface treated weather-proof time naked sample of steel 25~35%, antiseptic effect is obvious.Meanwhile the naked sample Surface Rust irregular colour of the not surface treated weathering steel of use is even and becomes rusty Liquid stream is hung, and corrosion rate increases and increased with the time；The naked sample Surface Rust color of weathering steel of the coating treatment fluid of the invention containing chromium Uniformly, become rusty liquid not sagging, and corrosion rate change is little.

Claims (2)

1. A kind of 1. containing chromium treatment fluid stable for naked steel rusty scale, it is characterised in that：The weight of each component in the treatment fluid containing chromium Percentage is：Sodium dichromate is 2.1~2.9%, NaHSO₃For 1.1~2.2%, FeSO₄For 0.8~1.4%, FeCl₃For 0.7 ~1.5%, acetic acid is 0.3~0.8%, triethanolamine is 0.2~0.3%, remaining is water.
2. 2. containing the chromium treatment fluid stable for naked steel rusty scale according to claim 1, it is characterised in that：This contains chromium treatment fluid The percentage by weight of middle each component is：Sodium dichromate is 2.6%, NaHSO₃For 1.4%, FeSO₄For 1.0%, FeCl₃For 0.9%th, acetic acid 0.5%, triethanolamine 0.3%, water 93.3%.