TWM628682U - Highly anti-corrosion layered structure - Google Patents

Abstract

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Description

High corrosion resistance layered structure

The present invention relates to a corrosion-resistant layered structure, in particular to a high corrosion-resistant layered structure with excellent corrosion resistance.

The existing technologies for metal surface treatment are mainly divided into electroplating and electroless plating. Electroplating is to use the principle of electrolysis to coat a thin layer of other metals or alloys on the surface of metal components, thereby improving the wear resistance, conductivity, corrosion resistance and aesthetics of the surface of metal components. However, electroplating is easy to cause uneven thickness of the coating and defects due to factors such as different conductive properties or complex component shapes, and the electroplating process consumes a lot of electricity and generates a large amount of waste water, which in turn results in a large amount of environmental protection costs.

Electroless plating uses the principle of autocatalysis to deposit the components to be plated in the plating solution on the surface of the element through a chemical reaction to form a plating layer. The plating layer formed by chemical plating is relatively dense and uniform in thickness. It is more friendly, so it has gradually become one of the important surface treatment technologies. However, the corrosion resistance of conventional electroless plating products is still insufficient, and obvious corrosion may still occur if they are exposed to a strong acid environment at medium and high temperature for a long time.

In view of this, the preparation of an electroless plating product with excellent corrosion resistance is still the goal of the relevant industry.

In order to achieve the above goals, the purpose of the present invention is to provide a highly corrosion-resistant layered structure, the corrosion-resistant protective layer of which has specific components, which can greatly improve the corrosion resistance of the high-corrosion-resistant layered structure.

An embodiment of the present invention provides a highly corrosion-resistant layered structure, which includes a substrate and a corrosion-resistant protective layer, and the corrosion-resistant protective layer is laid on a surface of the substrate. Wherein, the base material is made of a metal material, and the material of the corrosion-resistant protective layer includes nickel and phosphorus.

Accordingly, the novel high-corrosion-resistant layered structure can effectively protect the metal base material from being corroded by providing a corrosion-resistant protective layer containing nickel and phosphorus, thereby improving the performance of the high-corrosion-resistant layered structure in a medium-high temperature strong acid environment. Corrosion resistance.

According to the aforementioned high corrosion-resistant layered structure, the metal material can be a stainless steel material.

According to the aforementioned high corrosion-resistant layered structure, the metal material may be an aluminum alloy material.

According to the aforementioned high corrosion-resistant layered structure, the thickness of the corrosion-resistant protective layer may be 15 μm˜50 μm.

According to the aforementioned high corrosion-resistant layered structure, the nickel content of the corrosion-resistant protective layer may be 85 wt% to 90 wt%.

According to the aforementioned high corrosion-resistant layered structure, the phosphorus content of the corrosion-resistant protective layer may be 9 wt % to 13 wt %.

According to the above-mentioned high corrosion-resistant layered structure, the material of the corrosion-resistant protective layer may further include fluoride ions, and the content of fluoride ions may be 1×10 ¹² molecules/cm ² to 4×10 ¹³ molecules/cm ² .

According to the above-mentioned high corrosion-resistant layered structure, the material of the corrosion-resistant protective layer may further comprise nitrate ions, and the content of nitrate ions may be 5×10 ¹² molecules/cm ² to 2×10 ¹⁴ molecules/cm ² .

According to the above-mentioned high corrosion-resistant layered structure, the material of the corrosion-resistant protective layer may further comprise phosphate ions, and the content of phosphate ions may be 5×10 ¹¹ molecules/cm ² to 1.5×10 ¹⁴ molecules/cm ² .

According to the above-mentioned highly corrosion-resistant layered structure, the material of the corrosion-resistant protective layer may further comprise sodium ions, and the content of sodium ions may be 1×10 ¹² molecules/cm ² to 1.5×10 ¹⁴ molecules/cm ² .

According to the above-mentioned high corrosion-resistant layered structure, the material of the corrosion-resistant protective layer may further comprise potassium ions, and the content of potassium ions may be 1×10 ¹² molecules/cm ² to 1×10 ¹⁴ molecules/cm ² .

According to the above-mentioned high corrosion-resistant layered structure, the material of the corrosion-resistant protective layer may further include magnesium ions, and the content of magnesium ions may be 1×10 ¹² molecules/cm ² to 1×10 ¹⁴ molecules/cm ² .

According to the aforementioned high corrosion-resistant layered structure, the microhardness of the corrosion-resistant protective layer may be 400 HK˜600 HK.

According to the aforementioned high corrosion-resistant layered structure, the corrosion-resistant protective layer can be prepared by an electroless plating method.

Various embodiments of the present invention are discussed in greater detail below. However, this embodiment may be the application of various novel concepts, which may be embodied in various specific scopes. The specific embodiments are for illustrative purposes only, and are not intended to limit the scope of the disclosure.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a high corrosion-resistant layered structure 100 according to an embodiment of the new model. The high corrosion-resistant layered structure 100 includes a substrate 110 and a corrosion-resistant protective layer 120 , and the corrosion-resistant protective layer 120 is laid on a surface of the substrate 110 .

Specifically, the base material 110 is made of a metal material, the metal material can be any metal or alloy, and the metal material can be a metal or alloy with corrosion resistance, for example, a stainless steel The material or an aluminum alloy material is used to improve the overall corrosion resistance of the high-corrosion-resistant layered structure 100, but the present invention is not limited to this.

The material of the corrosion-resistant protective layer 120 includes nickel and phosphorus, and the corrosion-resistant protective layer 120 with nickel and phosphorus can be uniformly formed on the surface of the substrate 110 to provide excellent protection effect. The thickness of the corrosion-resistant protection layer 120 may be 15 μm˜50 μm, and the microhardness of the corrosion-resistant protection layer 120 may be 400 HK˜600 HK. When the corrosion resistant protection layer 120 has a sufficient thickness, in addition to improving the high corrosion resistance layered structure 100 In addition to the high corrosion resistance, it can also provide good wear resistance, and reduce the occurrence of the phenomenon that the substrate 110 is exposed due to abrasion of the corrosion-resistant protective layer 120 .

The ratio of nickel and phosphorus in the corrosion-resistant protective layer 120 is related to the properties of the corrosion-resistant protective layer 120. In the present invention, the nickel content of the corrosion-resistant protective layer 120 may be 85 wt% to 90 wt%, while the phosphorus content of the corrosion-resistant protective layer 120 Can be 9 wt% to 13 wt% to provide excellent corrosion resistance. In addition, when the content of nickel in the corrosion-resistant protective layer 120 is high, the corrosion-resistant protective layer 120 will have better conductivity and hardness, and when the content of phosphorus in the corrosion-resistant protective layer 120 is high, the corrosion-resistant protective layer 120 will have better conductivity and hardness. It has better gloss and ductility, so the nickel content and phosphorus content of the corrosion-resistant protective layer 120 can be adjusted according to the application field of the high-corrosion-resistant layered structure 100 .

The material of the corrosion-resistant protective layer 120 may further comprise fluoride ions, nitrate ions, phosphate ions, sodium ions, potassium ions and/or magnesium ions, and the content of fluoride ions may be 1×10 ¹² molecules/cm ² to 4×10 ¹³ molecules/cm ² , the content of nitrate ions can be from 5×10 ¹² molecules/cm ² to 2×10 ¹⁴ molecules/cm ² , and the content of phosphate ions can be from 5×10 ¹¹ molecules/cm ² to 1.5×10 ¹⁴ molecules/cm ² , the content of sodium ions can be from 1×10 ¹² molecules/cm ² to 1.5×10 ¹⁴ molecules/cm ² , and the content of potassium ions can be from 1×10 ¹² molecules/cm ² to 1×10 ¹⁴ /cm ² , the content of magnesium ions may be 1×10 ¹² molecules/cm ² to 1×10 ¹⁴ molecules/cm ² . By controlling the content of other ions in the anti-corrosion protection layer 120 , the corrosion resistance of the anti-corrosion protection layer 120 can be increased, and the structural strength of the anti-corrosion protection layer 120 can be prevented from being affected by too many other ions.

It is worth noting that the corrosion-resistant protective layer 120 can be prepared by an electroless plating method. For example, the substrate 110 can be immersed in a reaction solution containing a nickel compound and a phosphorus compound, so that the nickel compound in the reaction solution and the The phosphorus compound chemically reacts with the surface of the substrate 110 to form the corrosion-resistant protective layer 120 . Wherein, the surface of the substrate 110 can be pre-treated, such as surface cleaning, etching or pre-plating, to increase the reactivity of the substrate 110 with the reaction solution, and during the reaction process, the temperature or pH value can be changed by means of The reaction conditions are controlled to change the thickness or properties of the corrosion-resistant protective layer 120 , but the present invention is not limited thereto.

In the following, an acid etching test will be performed on the high corrosion resistance layered structure of one embodiment of the present invention to understand whether the high corrosion resistance layered structure of the present invention has sufficient corrosion resistance.

＜Acid Etching Test＞

In this test, the highly corrosion-resistant layered structure of one embodiment of the present invention is placed in a strong acid environment (for example, a strong acid solution such as hydrochloric acid, sulfuric acid, or nitric acid), and the pH value of the strong acid environment is -0.7 and the ambient temperature is 50 °C, after the high-corrosion-resistant layered structure is placed in the above-mentioned strong acid environment for 24 hours, the high-corrosion-resistant layered structure is taken out and the rust condition of the front and back surfaces is observed.

Please refer to Fig. 2A and Fig. 2B, Fig. 2A is a front view of the high corrosion-resistant layered structure of the embodiment of the novel after acid etching test, and Fig. 2B is the high corrosion-resistant layered structure of Fig. 2A after acid etching Rear view after testing. It can be seen from Figure 2A and Figure 2B that the surface of the new type of high corrosion-resistant layered structure is still intact even if it is in a strong acid environment at medium and high temperature for a long time, and there is no pinhole, foaming or color difference. , indicating that the corrosion-resistant protective layer in the high-corrosion-resistant layered structure can provide good protection, and the overall corrosion resistance of the high-corrosion-resistant layered structure is quite excellent, which is suitable for use in environments with strong acids and high temperatures.

To sum up, the novel high-corrosion-resistant layered structure can effectively protect the metal base material from being corroded by providing a corrosion-resistant protective layer containing nickel and phosphorus, thereby improving the high-corrosion-resistant layered structure to be used in a strong acid environment at medium and high temperature. low corrosion resistance.

Although the present invention has been disclosed as above with embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the appended patent application.

100: High corrosion resistance layered structure 110: Substrate 120: Corrosion-resistant protective layer

In order to make the above-mentioned and other objects, features, advantages and embodiments of the present invention more clearly understood, the accompanying drawings are described as follows: Figure 1 is a schematic structural diagram of a high corrosion-resistant layered structure according to an embodiment of the new model; FIG. 2A is a front view of the highly corrosion-resistant layered structure of one embodiment of the novel after the acid etching test; and FIG. 2B is a rear view of the highly corrosion-resistant layered structure of FIG. 2A after the acid etching test.

100: High corrosion resistance layered structure

110: Substrate

120: Corrosion-resistant protective layer

Claims (14)

A highly corrosion-resistant layered structure comprising: a substrate; and A corrosion-resistant protective layer, laid on a surface of the substrate; Wherein, the base material is made of a metal material, and the material of the corrosion-resistant protective layer includes nickel and phosphorus. The high corrosion-resistant layered structure according to claim 1, wherein the metal material is a stainless steel material. The high corrosion-resistant layered structure according to claim 1, wherein the metal material is an aluminum alloy material. The high corrosion-resistant layered structure according to claim 1, wherein the corrosion-resistant protective layer has a thickness of 15 μm˜50 μm. The high corrosion-resistant layered structure according to claim 1, wherein the nickel content of the corrosion-resistant protective layer is 85 wt% to 90 wt%. The high corrosion-resistant layered structure according to claim 1, wherein the phosphorus content of the corrosion-resistant protective layer is 9 wt % to 13 wt %. The highly corrosion-resistant layered structure according to claim 1, wherein the material of the corrosion-resistant protective layer further comprises fluoride ions, and the content of the fluoride ions is 1×10 ¹² molecules/cm ² to 4×10 ¹³ molecules/cm ² . The high corrosion-resistant layered structure according to claim 1, wherein the material of the corrosion-resistant protective layer further comprises nitrate ions, and the content of the nitrate ions is 5×10 ¹² molecules/cm ² to 2×10 ¹⁴ molecules/cm 2 ² . The highly corrosion-resistant layered structure according to claim 1, wherein the material of the corrosion-resistant protective layer further comprises phosphate ions, and the content of the phosphate ions is 5×10 ¹¹ molecules/cm ² to 1.5×10 ¹⁴ molecules/cm ² . The high corrosion-resistant layered structure according to claim 1, wherein the material of the corrosion-resistant protective layer further comprises sodium ions, and the content of the sodium ions is 1×10 ¹² molecules/cm ² to 1.5×10 ¹⁴ molecules/cm ² . The highly corrosion-resistant layered structure according to claim 1, wherein the material of the corrosion-resistant protective layer further comprises potassium ions, and the content of the potassium ions is 1×10 ¹² molecules/cm ² to 1×10 ¹⁴ molecules/cm ² . The highly corrosion-resistant layered structure according to claim 1, wherein the material of the corrosion-resistant protective layer further comprises magnesium ions, and the content of the magnesium ions is 1×10 ¹² molecules/cm ² to 1×10 ¹⁴ molecules/cm ² . The high corrosion-resistant layered structure according to claim 1, wherein the microhardness of the corrosion-resistant protective layer is 400 HK˜600 HK. The high corrosion-resistant layered structure as claimed in claim 1, wherein the corrosion-resistant protective layer is prepared by an electroless plating method.

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