CN201651001U

CN201651001U - Corrosion-resistant fastener

Info

Publication number: CN201651001U
Application number: CN2010201385865U
Authority: CN
Inventors: 饶建红; 张政
Original assignee: Shanghai Roc-master Heavy Industry Co Ltd
Current assignee: ROC-MASTER PIPING SLOUTIONS LTD.
Priority date: 2010-03-23
Filing date: 2010-03-23
Publication date: 2010-11-24
Anticipated expiration: 2020-03-23

Abstract

The utility model provides a corrosion-resistant fastener, which comprises a basal fastener body. The fastener is characterized in that: the basal fastener body is wrapped by a layer of metal underlayer, and the metal underlayer is wrapped by at least one layer of Teflon coating layer. The utility model has the advantage that the corrosion-resistant effect of the fastener is enhanced, thus meeting the requirements of different environments on the corrosion resistance of the surface of the product.

Description

A kind of anticorrosion fastening piece

Technical field

The utility model relates to a kind of anticorrosion fastening piece, is applicable to offshore oil environment and various strong acid-base rugged environment.

Background technique

The antiseptic property of fastening piece is as an important indicator of offshore oil pipeline system assembly, extensive application is in the oil transportation system and bringing into play crucial effects, the fastening piece antiseptic property is not up to standard, in case be corroded, the sealing of whole pipeline system also can be affected thereupon, thereby causes the leakage of liquid to cause economic loss without redemption possibly.Along with the continuous development of modern industry, it is more and more important that antiseptic property becomes, and almost related to all and be related to the every field of national economy and people's lives.Environment requires the more and more higher of also change to the antiseptic property of product.Therefore, under different operating modes, how to make the antiseptic property of product more superior and be useful in various rugged environments, need the problem that solves on the engineering with regard to having become.Common traditional anticorrosion process has: apply paint, smear rust preventive oil, oxidation, metallizing coating or the like, but the antiseptic effect of these technologies is all unsatisfactory, and in ocean engineering, do now more be exactly only to do bottom layer treatment or do not having under the situation of bottom layer treatment directly arbitrarily coating oil lacquer coating or metallic coating at product surface, but the adhesion of painting layer but is not fine, the also not attractive in appearance and rough surface of the outward appearance of metallic coating, wearing and tearing easily, damaging causes installing the back antiseptic effect and can have a greatly reduced quality, but also has increased workload and the cost of construction department greatly.

Summary of the invention

The purpose of this utility model provides a kind of fastening piece of favorable anti-corrosion effect.

In order to achieve the above object, the technical solution of the utility model has provided a kind of anticorrosion fastening piece, comprises fastener base, it is characterized in that, is wrapped with the layer of metal bottom in fastener base, is wrapped with the sharp fluorine long paint of one deck layer at least at metal back layer.

Further, described metal back layer and the contacted surface of described sharp fluorine long paint layer are roughened surface.

The thickness of described metal back layer is 5-25 μ m, and the thickness of described sharp fluorine long paint layer is 15-25 μ m.

The utility model has increased sharp fluorine long paint layer on the surface of fastener base, this coating has low frictional properties (being low to moderate 0.055), close adhesion, superior abrasionproof and undermines anti-drawing together property, anti-corrosive properties are splendid, incrust, the operating temperature range that can resist external environmental factor (severse weather, sunshine, salt water etc.), adapts to from-250 until 260 ℃.The outer surface of fastener base be coated be covered with this coating after, improved the antiseptic effect of fastening piece, can satisfy the corrosion resistance requirement of varying environment to product surface.

Description of drawings

Fig. 1 is a partial sectional view of the present utility model.

Embodiment

Specify the utility model below in conjunction with embodiment.

Embodiment

As shown in Figure 1, the partial sectional view of a kind of anticorrosion fastening piece that provides for the utility model, comprise fastener base 1, be wrapped with layer of metal bottom 2 in fastener base 1, be wrapped with the sharp fluorine long paint of one deck layer 3 (the RocCote coating that sharp fluorine long paint layer 3 is produced for Shanghai Roc-Master Heavy Industry Co., Ltd.) at least at metal back layer 2.Described metal back layer 2 is a roughened surface with described sharp fluorine long paint layer 3 contacted surface.The thickness of described metal back layer 2 is 5-25 μ m, and the thickness of described sharp fluorine long paint layer is 15-25 μ m.

Making method of the present utility model is:

The first step, 3 pretreatment of the sharp fluorine long paint layer of coating:

1, fastener base 1 was taked blasting craft in the surface before applying, and made cleaning surfaces, materials such as no grease and dust;

2, after sandblast is finished, can select proper metal bottom 2 on request, as zinc-plated or phosphatization etc., after metal back layer 2 disposes, the surface needs suitable roughness to increase the adhesion of sharp fluorine long paint layer 3, for the use of varying environment, the thickness of metal back layer 2 also there is different requirements, as shown in the table:

The Environmental Conditions grade	Thickness, minimum μ m
		SC4 (very severe)	25
SC3 (badly)	12
		SC2 (medium)	8
SC1 (gentleness)	5

The SC4----very severe---be exposed under the rugged environment or frequent be exposed in the wet environment, in the cleaning solution neutralized salt solution, and easily by depression, scratch or scratch.For example: the member on plumb device or the electric pole etc.SC3----is abominable---be exposed in the extracting liquid, in sweat, rainwater or the cleaning solution.For example: tube, screen, window device, structural element, military hardware, washing machine part or attachments of a bicycle etc.SC2----is medium---be exposed to dry indoor environment, can contact concentrated liquid once in a while, wear and tear or fray.For example: cutter, slide fastener or machine parts etc.The SC1----gentleness---be exposed in the indoor environment, seldom can run into concentrated liquid or be worn, fray.For example: button, wire or permanent tooth device etc.

3, coating is carried out some preparatory works:

A. the preheating of coating is preheated to 30 ℃ to 40 ℃ and gets final product;

B. add thinner coating is diluted, thinner is poured into 5% ratio, with the rotating speed of 40r/min-50r/min coating is fully stirred 10-15min with stirrer;

C. with flow cup the viscosity of coating is measured, the viscosity that requires coating is between 30s-40s;

D. treat that everything is ready, coating continued to stir that so far, the preparatory work of coating is finished with stirrer.

4, before applying sharp fluorine long paint layer 3, must be with the Fastener products preheating, be preheated to the fastener surface temperature 50 ℃ to 70 ℃ for well, specifically carry out with the viscosity of coating, with assurance coating no sag phenomenon, apply sharp fluorine long paint layer 3 subsequently.

Second step, curing are handled:

1, solidifying device therefor must be high temperature oven, furnace temperature temperature difference control must ± 10 ℃ with interior or littler be good, the warming velocity of equipment can not be too soon to prevent that sharp fluorine long paint layer 3 from bubbling, probably rise to the holding temperature time and be controlled at 30min to 40min and be advisable from normal temperature;

2, effectively solidifying temperature is advisable at 208 ℃ to 215 ℃, temperature is low excessively, then can cause the solidification effect of sharp fluorine long paint layer 3 poor, final its antiseptic property that influences, temperature is too high then can to cause the coating burn-off phenomenon, after temperature rises to effective solidifying temperature, must in this temperature range, be incubated, holding time maintains 20min and is advisable;

3, waiting to be incubated operation finishes, allow the product natural cooling, then product is carried out aspect checks such as outward appearance, performance: outward appearance, phenomenons such as coat the defect and coating shedding, foaming, burning, leakage spray can not be arranged, also need to detect curing in surperficial wiping in addition and whether put in place with medicaments.

4, underproof for above detection, then need coating is repaired, common repairing method has: fill spray, solidify again, the surface applies etc. again.

Anticorrosion fastening piece of the present utility model can be placed 1000-3000 hour in the B117 salt spray test in U.S. experiment and materials science, and circulation 30-50 time in Germany industrial standard 50018Kesternich experiment (2 liters of sulfur dioxide).

Claims

1. an anticorrosion fastening piece comprises fastener base (1), it is characterized in that, is wrapped with layer of metal bottom (2) in fastener base (1), is wrapped with the sharp fluorine long paint of one deck layer (3) at least at metal back layer (2).

2. a kind of anticorrosion fastening piece as claimed in claim 1 is characterized in that, described metal back layer (2) is a roughened surface with the contacted surface of described sharp fluorine long paint layer (3).

3. a kind of anticorrosion fastening piece as claimed in claim 1 is characterized in that, the thickness of described metal back layer (2) is 5-25 μ m, and the thickness of described sharp fluorine long paint layer (3) is 15-25 μ m.