> ブログ > よくある問題 > What is passivation? Does my product need it?

What is passivation? Does my product need it?

ソース:前業精密 時間:2022-9-14
 “My new stainless steel product specification requires’ passivation ‘. Do I need it?” Our answer is that you may not. That’s why.
Passivation is the process of protecting stainless steel from corrosion by adding an oxide layer on its outer surface. Although some stainless steel product specifications require passivation to reduce corrosion risk, most of them are unnecessary and expensive, and may damage some metal products, including flat bar springs, such as constant force, variable force and constant torque springs, all of which are uncommon products manufactured by Qianye precision.

    The reason passivation is not a good idea for flat bar springs is because passivation involves the use of acids and harsh chemicals to initially clean the metal as part of the process. The geometry of these spring types means that many small cracks can form between the coil layers. The acid used in passivation can become trapped in these crevices. This resulted in longer-than-expected exposure of the stainless steel, which in turn resulted in hydrogen embrittlement and eventual spring failure. Additionally, mechanically exposing all surfaces of the spring to acid can damage the spring, resulting in changes in force/torque output or defects.

There are better, simpler, cheaper ways to avoid any need for corrosion and passivation of stainless steel components, and it’s as simple as choosing a fussy material. Remember that the risk of corrosion of any stainless steel component is driven by the environment (such as the presence of water and other chemicals) and Qianye Precision typically uses high quality 301 stainless steel for our springs. Our stainless steels typically contain 16% to 18% chromium, an element that forms a protective layer in passivation anyway. These percentages are comparable to various other stainless steel grades specified in the ASTM A666 Specification for Austenitic Stainless Steels. This chromium content provides corrosion protection in most non-extreme environments.

    In summary, specifications sometimes require passivation to prevent corrosion, even after proper material selection; however, the acids and chemicals used in cleaning stainless steel for passivation can severely damage constant force, power, and constant torque springs . Choosing a different alloy (this is where our Qianye Precision Engineers can help!) may invalidate any passivation needs. Not all springs are susceptible to damage from the passivation process (such as open helical compression springs, bar and wire), but there are still some risks and added costs, so we recommend avoiding passivation altogether.
    深セン銭業精密金属有限会社 was established in 2006, supplying high-quality stainless steel springs for many fields. Through continuous efforts, it has obtained 19 patent certificates and 4 spring equipment software copyrights granted by the State Intellectual Property Office, creating an enviable industry influence. The company designs and manufactures a wide range of power springs, constant force springs, constant torsion springs, variable force springs and motor brush springs. Chiba works closely with customers to develop custom solutions to meet their individual needs. In order to provide better service, it has been continuously investing in production technology and supply chain. The company itself is a stainless steel raw material manufacturer. Due to the support of raw materials, there is no material limitation when making spring products; special material requirements can be developed and manufactured; in addition, the delivery time is greatly shortened. Quality is the top priority. Qianye has passed ISO9001, ISO14001 and national high-tech enterprise certification, and attaches great importance to the training of employees. Its spirit is “treat people with sincerity, create things with sincerity”, and strive for excellence.

最新ニュース

 Constant Force Torsion Springs: Unleashing the Power of Consistent Torque
Constant Force Torsion Springs: Unleashing the Power of Consistent Torque

Time:2023-7-1

Introduction In the world of mechanical engineering, springs play a crucial role in various applications. One such type of spring, the constant force torsion spring, is gaining popularity due to its ability to deliver consistent torque. This article aims to explore the concept of constant force torsion springs, their working principle, and their wide range of applications. Understanding Constant Force...

 Versatile Applications of Constant Force Springs Across Industries
Versatile Applications of Constant Force Springs Across Industries

Time:2023-8-18

Constant force springs are mechanical devices that provide a consistent force over a wide range of motion. They are widely used in various industries due to their reliability and versatility. In this article, we will explore some of the common applications of constant force springs. One of the primary applications of constant force springs is in the field of automotive...

 Electric Fan Lifting Spring: A Must-Have Accessory for Your Fan!
Electric Fan Lifting Spring: A Must-Have Accessory for Your Fan!

Time:2023-5-8

Electric fans have become an indispensable part of our lives, especially during hot summers. They are used in homes, offices, hospitals, and other places to provide cool air and comfort. However, there is one common problem that people face with electric fans – they are often too low and do not provide air at the desired height. This is where...

 Spiral Torsion Spring Design: Essential Factors to Consider
Spiral Torsion Spring Design: Essential Factors to Consider

Time:2023-5-31

Spiral torsion springs are essential components in various mechanical systems. They are used to store and release energy as well as to absorb shock and vibration. The design of spiral torsion springs is critical to the performance of the overall system. In this article, we will discuss the essential factors to consider when designing spiral torsion springs. 1. Load Requirements...

 China’s Top-Quality Steel Torsion Springs: Unmatched Durability and Precision
China’s Top-Quality Steel Torsion Springs: Unmatched Durability and Precision

Time:2023-12-28

China has emerged as a global leader in manufacturing high-quality steel torsion springs. These springs are widely used in various industries due to their unmatched durability and precision. With advanced manufacturing techniques and stringent quality control measures, Chinese companies have established a reputation for delivering top-quality products that meet the highest international standards. Unmatched Durability One of the key attributes...

 Designing an Electric Fan Lifting Spring for Enhanced Functionality
Designing an Electric Fan Lifting Spring for Enhanced Functionality

Time:2023-5-10

Introduction An electric fan is an essential appliance in most homes and offices. It helps to keep the air circulating and provides a cooling effect during hot weather. However, the design of electric fans has remained relatively unchanged for decades. In this paper, we propose a new design for an electric fan lifting spring that enhances the functionality of the...

Product
 パワースプリング
パワースプリング
特徴: パワー スプリングは鋼帯で巻かれています。外径を制限するためにスプリングボックスが必要です。スプリングの中心はシャフトに接続されています。いつ...
 最適化設計サービス
最適化設計サービス
製品のアイデア、設計から完成品の製造まで、お客様がそれらを完成させるのを支援し、お客様が専門的な観点からばねの使用、スピードアップ、製品の最適化を支援できます...
 定荷重ばね
定荷重ばね
特徴:コンスタントフォース(コンスタントフォース)スプリングはステンレス鋼帯を巻いたものです。高強度鋼帯は、特定の製造用ばね装置によって成形されます。外力がそれらをまっすぐにすると、...
 カーボンブラシスプリング
カーボンブラシスプリング
特徴: 1.一定の力により、カーボンブラシと整流子の長さに関係なく、圧力は同じままです。 2.コンスタントフォーススプリングがカーボンブラシを...
 定ねじりばね
定ねじりばね
特徴:固定(定)トルクバネ(スプリング)はステンレス製です。外力により、ぜんまいが自然な状態から出力車に巻き戻されます (エネルギー貯蔵)。いつ...
 組み立ておよび取り付けサービス
組み立ておよび取り付けサービス
Qianye Company は、精密ばねの製造を提供するだけでなく、ばねシステム全体の構造設計と機能ソリューションにも焦点を当てており、完全な...